Forbidden Weapons in Octopath Traveler 0 — All 8 Locations, Drawbacks, and Best Users

Forbidden Weapons are Octopath Traveler 0's temptation equipment: 8 weapons with stats at or near the top of their categories, each carrying a drawback that punishes careless use. Equip one on the right character and it outperforms almost everything else in the game; equip it on the wrong character and you have made your party worse while feeling stronger. They are build-around pieces, not upgrades — and understanding that distinction is the entire skill of using them.

Before the details, the usual honesty note. You will see "9 Forbidden Weapons" repeated across the community, but that count is another Octopath Traveler 2 carryover: the full weapon-table data for Octopath Traveler 0 shows exactly eight, one per weapon type — Blade, Spear, Dagger, Axe, Greatbow, Staff, and the two types new to this entry, Tome and Fan. The design (high stats plus drawbacks) is consistently documented; per-piece locations and exact drawback values are inconsistently documented as of patch 1.0.7.0, and several circulating lists appear to mix in data from earlier Octopath games. This guide teaches the system, the reliable hunting method, and the evaluation framework — and flags rather than fabricates the rest. Verify individual pieces against your own game.

How the Forbidden system works

The design is simple to state and subtle to use: a Forbidden Weapon trades a large stat advantage for an attached penalty. The stats are genuinely elite — these are endgame weapons that compete with or exceed the Battle-Tested line on raw numbers. The drawback is the price, and it comes in the flavors you would expect from the series' design language: penalties that tax the wielder's survivability, their resource economy, or their consistency.

Three rules of thumb for evaluating any Forbidden piece:

1. The drawback is part of the stat line. A weapon with +X attack and a penalty is not "+X attack" — it is the net of both, on a specific character, in a specific fight. Evaluate the package, not the headline number.
2. Drawbacks are character-relative, not absolute. A penalty that cripples one wielder can be irrelevant to another. A drawback taxing something a character never uses is close to free; a drawback hitting their core function is disqualifying, no matter how big the attack stat is.
3. Short fights forgive drawbacks; long fights expose them. Anything that drains, ticks, or accumulates gets worse the longer a fight runs. Forbidden pieces shine in Break-burst strategies that end fights quickly and get riskier in attrition fights — which makes them superb for farming setups and demanding for super bosses.

Finding the eight pieces — the reliable method

Exact per-piece locations are the least stable part of community documentation for this game, so here is the acquisition doctrine that works regardless of which list is accurate:

1. Treat Forbidden Weapons as endgame-area content. Pieces of this tier live where Lv.60 NPCs and post-game dungeons live. If you are still mid-story, you are early; the natural collection window is the post-game sweep.
2. Sweep late areas with chest discipline. Endgame dungeons and high-level regions are where the community consistently reports finding equipment of this class. Clear every chest in the Garden of Sin / Skies of Vanity tier of areas and the late overworld regions; do not leave a dungeon with an unopened room.
3. Check the unusual sources. This series loves hiding top equipment behind non-chest interactions: powerful NPCs (the same social web that holds Battle-Tested duelists), quest conclusions, and town systems. When a community report attributes a Forbidden piece to an NPC or quest, verify it in game before routing your play session around it.
4. Track your count. Eight is the target. The in-game inventory makes the set countable, so you always know your remainder — cross-reference community lists to generate leads for the missing ones, then confirm each lead yourself.
5. Do not confuse the lines. Forbidden Weapons are their own set: they are not Battle-Tested pieces (those come from Contend duels with Lv.60 NPCs), not Sacred Treasures (8 pieces, Crested Keys — guide), and not Legendary Treasures (11 pieces across Path Actions, Trade Lists, and blue chests — guide). Community lists that blur these sets are a known source of bad information.

If a specific piece eludes you after a thorough sweep, the pragmatic answer is to continue the other post-game lines and let your region-by-region passes for Side Stories, elite enemies, and treasures surface it naturally — the post-game content in this game overlaps heavily by design.

Evaluating each piece — the framework that matters

Since we are not going to pretend to verified per-piece stats, here is what actually helps: the evaluation framework experienced players apply to each Forbidden Weapon as it drops, and the roster archetypes that tend to make each category sing.

Physical pieces (Sword / Polearm / Dagger / Axe / Bow)

Who wants them: your Break-window damage dealers — the characters who hold 3 BP and a Lv.3 Ultimate for the moment the boss Breaks and takes roughly double damage. On this roster that means Warrior-bodied frontliners and arena-grade recruits (Reime is the community's favorite example), plus Hunter- and Thief-type physical specialists.

What makes a Forbidden physical piece worth it: the attack stat has to clear your best Battle-Tested alternative by enough that the drawback is noise. Break windows multiply damage — a bigger weapon inside a doubled-damage window is worth more than the same upgrade in a vacuum — so physical Forbidden pieces with tolerable drawbacks are the best burst weapons in the game.

What disqualifies one: any drawback that taxes the wielder's survival or consistency in long fights. Your damage dealer dying mid-window, or missing turns, costs more than the stat line adds.

Caster pieces (Staff / Tome)

Who wants them: Scholars and Clerics — Cyrus and Ophilia archetypes, plus anyone carrying elemental Action Skills. Staff pieces in particular pull double duty: elemental damage in Break windows and healing throughput everywhere else.

What makes them worth it: for casters, the stat-to-damage conversion is direct, and caster drawbacks are often easier to route around — a caster parked in the back row (regenerating HP/SP, gaining BP) is exposed to less of whatever the weapon taxes.

What disqualifies one: drawbacks that hit SP economy or healing output. A Cleric whose Forbidden Staff quietly degrades their sustain is a trap wearing a big number.

The new weapon types (Fan, and Tome above)

Tome and Fan are new to Octopath Traveler 0, which means two things. First, your roster's coverage of these types is probably thinner than the classic six — check who can actually wield a Forbidden Fan before celebrating it. Second, community data on these pieces is the thinnest of all; apply extra skepticism to any claimed stats and verify in game.

The "wrong character" test

For every Forbidden piece, ask one question: does this drawback touch anything this character actually does? If no — the piece is nearly free power on them. If yes — it belongs to someone else or to the storage box, regardless of the attack stat. This single test is the difference between players who love the Forbidden line and players who conclude it is bait.

Forbidden vs. Battle-Tested — when to use which

The two top weapon lines answer different questions:

• Battle-Tested gear is reliable power: no drawbacks, no conditions, gated behind Contend duels with Lv.60 NPCs. It is the default correct answer for any character and any fight.
• Forbidden Weapons are conditional power: higher peaks, attached prices. They are the right answer when the drawback is neutralized by the wielder or the fight plan.

The practical decision tree:

1. Is the fight short or burst-oriented? (Farming runs, speed-kills, Break-burst bosses.) Forbidden pieces shine — drawbacks have no time to accumulate. This is why community speed-kill setups, like the Reime + Cyrus Orochi farm covered in our super boss guide, are natural Forbidden-weapon builds.
2. Is the fight long and attritional? (Super bosses, the Galdera finale.) Default to Battle-Tested unless the Forbidden drawback is provably irrelevant to that character's role.
3. Does the wielder use what the drawback taxes? If no, the Forbidden piece is simply a better Battle-Tested weapon for them. If yes, it is worse regardless of the stat line.

And a note on experimentation cost: equipment swapping in this game is free and instant outside combat. There is no reason not to own both answers per slot and choose per fight. The players who get the most from the Forbidden line treat their equipment screen as a per-encounter decision, not a permanent assignment.

Team-building around Forbidden pieces

If you commit to a Forbidden build — and for burst strategies you should — a few structural notes:

• Sustain covers drawback risk. Whatever the weapon taxes, your party's sustain has to absorb the failure cases. A healer per row and Aelfric's Favor (the protagonist's front-row heal + cleanse Ultimate) are the insurance policy that makes aggressive Forbidden builds playable.
• Back-row rotation defuses ticking penalties. The back row regenerates HP/SP and gains BP every turn. A Forbidden wielder who rotates out after their burst turn spends half the fight insulated from their own weapon's drawback.
• Action Skills patch what the build exposes. Masteries (equippable skills usable by any companion) let you hand your Forbidden carrier a defensive or sustain skill from another job family — the Training Ground's mastery system (500–2500 JP fees) exists for exactly this kind of surgery.
• One Forbidden star per fight plan, not five. A party where everyone carries a drawback is a party with five problems. Pick the one character whose burst matters most, build the Forbidden package around them, and let the rest of the eight run clean, reliable gear.

Common pitfalls

• Equipping by attack stat alone. The headline number is the bait; the drawback is the hook. Run the "wrong character" test on every piece.
• Using Forbidden weapons in attrition fights by default. Long fights are where drawbacks compound. Burst plan or Battle-Tested — pick one deliberately.
• Trusting imported location/stat lists. Community documentation for this line is polluted with carryover from OT1/OT2. Verify each piece in your own game.
• Ignoring Tome/Fan coverage. The two new weapon types sneak into the set; know who on your roster wields them.
• Forgetting the count. Eight pieces. If your collection is stuck, the missing ones are in the endgame areas or behind the non-chest interactions you have not swept yet.
• Benching pieces instead of re-testing them. A Forbidden weapon that failed on one character may be elite on another. The drawback is character-relative — re-run the test before shelving anything.

Expected results

Used well, the Forbidden line gives you the highest burst ceilings in the game: faster Break-window kills, faster farms, and the damage backbone of community speed-clear setups. Used carelessly, it gives you dead damage dealers and confusing wipes. The difference is never the weapon — it is the matching. Collect all eight, run the "wrong character" test on each, deploy them where bursts end fights, and keep Battle-Tested gear as the reliable baseline everywhere else.

Related guides

• Battle-Tested gear — the no-drawback baseline this line is compared against
• Post-game checklist — where Forbidden hunting fits in the completion order
• Super boss: Amatsukami No Orochi — the fight Forbidden burst builds are made for
• Sacred Treasures and Legendary Treasures — the other equipment lines
• Best party composition — building the burst core that wields these weapons
• True ending guide — the Galdera fight, where drawback discipline matters most

A taxonomy of drawbacks — what to expect and how to route around each type

Since verified per-piece data is thin, the most useful thing we can give you is a working taxonomy: the categories of drawback this design language produces, and the counter-play for each. When a Forbidden Weapon drops, identify which family its drawback belongs to and the response is usually obvious.

Survival taxes. Drawbacks that chip at the wielder's durability — reduced defenses, HP costs, self-inflicted pressure. Counter-play: back-row rotation (the wielder only steps forward for their burst turn, then returns to regenerating safety), a dedicated sustain line aimed at them, and short-fight strategies where the tax never accumulates. Worst matchup: long attrition fights and super bosses.

Resource taxes. Drawbacks that hit SP, BP, or skill economy — more expensive skills, drained resources, throttled regeneration. Counter-play: SP-restoration item budgeting, multi-hit normal attacks as the shield-shredder of choice (they are free), and party structures that do not depend on the wielder's utility — only their damage. A Forbidden carrier should be a specialist, not a lynchpin.

Consistency taxes. Drawbacks that introduce variance or conditions — penalties tied to states, timings, or trade-offs that sometimes misfire. Counter-play: fight selection. Consistency taxes are cheapest in fights you control (farming, speed-kills, rematches via the strange monument) and most expensive in fights you do not (first-time super boss attempts).

Opportunity taxes. Sometimes the "drawback" is subtle: the weapon is so specialized that equipping it forecloses other options — wrong element, wrong skill synergy, a stat profile that fights the wielder's kit. Counter-play: the "wrong character" test from earlier. If the weapon's profile and the character's function disagree, no stat line fixes the marriage.

Worked examples — applying the framework to roster archetypes

Abstract rules land better with concrete applications. Here is how the evaluation runs on the roster archetypes every endgame player has:

The arena-grade Warrior (Reime archetype). Lives for Break windows; holds 3 BP and a Lv.3 Ultimate for the moment damage doubles. Ideal Forbidden carrier if the drawback is a resource or consistency tax — the character barely acts outside windows anyway, so taxes that tick between bursts barely apply. Survival taxes are manageable via back-row parking. This is why community burst builds start here.

The elemental Scholar (Cyrus archetype). Converts stats directly into damage and covers the elemental half of your Break plan. Resource taxes are the danger — a Scholar with throttled SP is a Scholar with throttled everything. Survival taxes are unusually tolerable: casters naturally live in the back row, regenerating, stepping forward only to cast. A Forbidden Staff or Tome with a survival-side drawback is often close to free power here.

The sustain Cleric (Ophilia archetype). Usually the wrong carrier. Healing throughput and cleanse reliability are the party's load-bearing walls; any drawback touching them risks cascade failures. Exception: if your sustain is deliberately redundant (two sustain plans per row, which endgame doctrine wants anyway), a Forbidden piece on the secondary sustain can be acceptable.

The utility Thief/Dancer archetype. Case-by-case. If the character's value is debuffs, speed, and BP donation rather than damage, a big attack stat is wasted and only the drawback is real. If they are built as a secondary damage dealer, the physical-piece logic applies at reduced priority — they eat after the primary carriers.

Fight-by-fight deployment matrix

Where Forbidden pieces earn their slot, ranked by how friendly the content is to drawback management:

1. Farming and speed-kills — friendliest. Short fights, controlled conditions, burst plans. This is the natural home of the whole line.
2. Boss rematches via the strange monument — friendly. Known fights, repeatable, low stakes. Ideal testing ground for new pieces.
3. Story-boss-tier content — neutral. Drawbacks rarely decide these fights either way; equip freely.
4. The Galdera finale — demanding. Full-party setpiece, long fight. Only pieces whose drawbacks are provably neutral to the wielder.
5. Amatsukami No Orochi first clears — harshest. Survival doctrine rules; Battle-Tested reliability beats Forbidden peaks until the fight is solved. After the solve, Forbidden burst builds are how clears become farms.

Collection logistics — folding the line into your routes

Forbidden hunting shares geography with everything else in the post-game, so:

• Attach it to the region sweep described in the post-game checklist: every dungeon cleared completely, every unusual NPC checked, every late-area chest opened. Forbidden pieces surface from exactly this discipline.
• Let the count guide you. Eight pieces, countable in inventory. When the count stalls, the answer is almost always an unswept endgame area or an unchecked NPC interaction, not bad luck.
• Test pieces as they drop, not at the end. Each new Forbidden weapon is a five-minute equipment-screen experiment against your current build. Pieces tested incrementally get used; pieces hoarded for a "final build session" get forgotten.
• Keep the receipt. When you swap a piece off a character, note why — the same reasoning will apply when the next piece with a similar drawback drops.

Frequently asked questions

Are Forbidden Weapons strictly better than Battle-Tested gear? No — they are situationally better. Higher stat ceilings, attached drawbacks. Battle-Tested is the reliable baseline; Forbidden is the conditional peak. Endgame builds mix both.

Should I sell or stash pieces that fail the "wrong character" test on everyone? Stash. Rosters change — new recruits, new job unlocks, new builds — and a piece that is wrong for everyone today may be perfect for a character you recruit or rebuild tomorrow. Storage is free.

Do drawbacks stack if I equip multiple Forbidden pieces? Each piece's drawback applies independently, which is exactly why the doctrine is "one Forbidden star per fight plan." A party carrying five sets of drawbacks has five problems and usually zero corresponding advantages that a clean build would not provide.

Can I use Forbidden weapons on the protagonist? Yes, and the protagonist is often a good carrier: their job-switching flexibility means you can rebuild them around whatever a piece demands. Just remember they are also your Aelfric's Favor button — do not let a drawback compromise that role in fights where you depend on it.

Is one Forbidden piece per weapon type, or do some types have more? One per type, eight total: Blade, Spear, Dagger, Axe, Greatbow, Staff, Tome, and Fan — including both weapon types new to this entry. That even spread is worth knowing for roster planning: whatever your main damage dealer wields, a Forbidden option exists for their type, and the only question is whether its drawback passes the "wrong character" test on them.

The bottom line

The Forbidden line rewards a specific kind of player: one who reads the whole stat line, asks what the drawback touches, and chooses gear per fight instead of once per playthrough. If that is you, these eight pieces are the highest ceilings in the game and the engine of every serious burst setup. If it is not — if you want equipment you can equip and forget — the Battle-Tested line is honest gear for honest players, and there is no shame in leaving the forbidden fruit on the branch. The game is beatable top to bottom without these. It is just faster, and more interesting, with them.

A closing note on collection order

If you are holding this guide and the Battle-Tested one at the same time, the order of operations is: Battle-Tested first, Forbidden second, mixed loadouts forever after. The reason is dependency, not preference — a clean Battle-Tested baseline is what makes Forbidden experimentation safe. With reliable gear underneath, a Forbidden piece that underperforms costs you one equipment swap; without it, the same experiment costs you a fight. Build the floor, then chase the ceiling. That sequence — floor first, ceiling second — is the entire equipment philosophy of this game's post-game compressed into one sentence.