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Main Quest · Zetsubou No Shima

Seeds of Doubt

Seeds of Doubt is the main Easter egg on Zetsubou No Shima. It requires the Skull of Nan Sapwe to reveal hidden geometry, the Masamune to damage the boss, a Gas Mask for every player, and — unavoidably — the Anywhere But Here! GobbleGum to reach one of the three cogs. Expect the setup to take considerably longer than the fight.

Difficulty: ExpertSolo availableSpoilers: high
Start Guided ModeJump to steps
Still from “Official Call of Duty®: Black Ops III – Eclipse DLC Pack: Zetsubou No Shima Trailer”
Zetsubou No Shima · Call of Duty via YouTubeOpen route diagram

Spoiler warning

This walkthrough reveals the map's finale. Continue only if you want to know how it ends.

Preparation

Before you start

Prerequisites

  • • Power on, Pack-a-Punch drained
  • • Skull of Nan Sapwe obtained
  • • KT-4 upgraded to the Masamune
  • • A Gas Mask for every player
  • • The Anywhere But Here! GobbleGum — there is no alternative route to one cog

Walkthrough

Step by step

  1. 01

    Expose the broken generator

    Mesmerize the torn blueprint in the Living Quarters, then Mesmerize the wall beside the derelict elevator.

    The Skull’s Mesmerize mode reveals hidden objects as well as pacifying enemies. Reading the blueprint first is what makes the wall respond. Behind it is a generator missing three cogs.

  2. 02

    Recover the three cogs

    One is hidden above Lab A, one comes from shooting down a cargo plane, and one sits on a dock under the zipline.

    The Lab A cog needs the Anywhere But Here! GobbleGum. The plane is shot down with the FlaK 88 using a flak shell grown from a blue-watered plant fertilised with the KT-4 — the shell is not guaranteed, so grow several. The dock cog needs an electrified shield used on the zipline control panel to drop off mid-ride.

    Tip: Any order. The plane step is the one most likely to need repeating.

  3. 03

    Repair the elevator and descend

    Fit the cogs, then take the elevator down as a group.

    Everyone descending needs a Gas Mask, and at least one player must be carrying the Masamune — nothing else damages the boss.

  4. 04

    Kill the Giant Thrasher

    Shoot its weak-spot spores with the Masamune, four in sequence.

    The weak spots are time-gated, so the encounter lasts several minutes regardless of how well you shoot. Zombies, spiders and ordinary Thrashers keep arriving throughout — someone should be handling the room rather than the boss.

Following along in-game? Switch to Guided Mode for one step at a time on a screen you can read at arm's length.

References

  1. 1.Call of Duty Wiki — Fandom. callofduty.fandom.com · accessed Jul 15, 2026Community-verifiedcorroborate
  2. 2.In-game verification — CODZombie editorial. codzombie.com · accessed Jul 15, 2026In-game verified

Last reviewed Jul 15, 2026. Spotted an error? Suggest a correction.