The Mound: Omen of Cthulhu Enemy Guides#
An honest disclaimer first: no official or verifiable source has published a complete bestiary for The Mound: Omen of Cthulhu. Monster lists, health pools, damage values, movesets, and drop rates all lack reliable sources, so we won’t speculate. The “seven bosses with movesets and drop tables” page that used to live here was entirely fabricated and has been removed in full.
This page only covers what can be verified: the combat targets named by the achievement system, plus the non-corporeal threats created by the Madness system. One expectation to correct up front: this is an extraction horror shooter, and traditional multi-phase boss fights don’t exist here — don’t come looking for a boss health table.
Why the Codex Has at Least 13 Pages#
The collection system’s Creature Codex has two achievements tied to it: Pages Best Left Blank (fill in 7 pages) and The Horrors Named (fill in 13 pages). Those thresholds tell us the codex contains at least 13 named entries — but which creature each page corresponds to has no reliable source, so treat the in-game codex as the final word.
Verified Combat Targets#
Y’m-bhi (Hostile Creature in the Jungle)#
Three achievements are built directly around it, which makes it one of the most common fightable threats in the jungle:
| Achievement | Requirement | What It Reveals |
|---|---|---|
| One Clean Throw | Kill a Y’m-bhi with a spear headshot | Spear throws have a headshot hitbox |
| Aim True | Land 50 headshots on Y’m-bhi | Headshots are a repeatable, reliable kill — worth practicing |
| Just in Time | Interrupt a Y’m-bhi the moment it’s about to grab a teammate | It grabs teammates, and the grab has an interruptible window |
Engagement advice (operational inference from the mechanics above):
- Default to spear headshots and save musket ammo for messier situations.
- When a teammate gets grabbed, interrupt first — a grabbed teammate can’t self-rescue, and with friendly fire always on, spraying bullets into the rescue can turn into a second casualty.
- The 50 headshots for Aim True is a pure practice achievement: a few opportunistic headshots per expedition add up naturally. No need to grind it.
Bandurria (Flying Hostile Creature)#
The Long Shot achievement requires dropping a Bandurria in flight from 50 meters away. Two things are confirmed: it can be shot down mid-flight, and the musket class of ranged weapons has the accuracy and stopping power to kill at 50 meters. Lock onto it early in open terrain, and when you hear movement, find it before deciding whether to fire — a gunshot gives away your position, and whether that’s worth it depends on your extraction route. Its distribution hasn’t been published.
Hallucination Threats#
The Madness system generates hallucinations and false audio, degrading vision and hearing at the same time until fact and fiction blur. This means not every “threat” is corporeal: you and your teammates can reach completely different conclusions about the same stretch of jungle — Madness is per-player, so the anomaly you see doesn’t show up for anyone else.
How to tell hallucination threats from real enemies:
| Signature | Real Enemy | Hallucination |
|---|---|---|
| Do teammates see it too | Yes | No (Madness is per-player) |
| Stays still for a long time | Moves and engages | Often just a sound, or a fleeting glimpse |
| Cross-check result | Confirmed by two players | A single report proves nothing |
| Sensible response | Handle per engagement discipline | Hold your noise, don’t waste ammo |
Rule of thumb: when you can’t agree, treat sounds as a real threat; something neither of you can see mostly isn’t there; Madness intensity rises the deeper you go, so “enemy contact” reported in the deep zones needs two-player confirmation more than anywhere else.
Corrupted Teammate Revivals#
Downed teammates can become corrupted and return as enemies. This is the game’s most unusual enemy source: some of what you fight used to be your teammate. Two disciplines follow from that — revive downed teammates decisively, because delay only adds variables; and show no mercy to a corrupted revival, because it’s no longer your teammate.
Four Threat Types at a Glance#
| Threat | Source | Recommended Response | Related Achievements |
|---|---|---|---|
| Y’m-bhi | Corporeal jungle enemy | Spear headshots; interrupt when it grabs a teammate | One Clean Throw / Aim True / Just in Time |
| Bandurria | Flying corporeal enemy | Shoot it down from 50 meters with the musket | Long Shot |
| Hallucinations | Produced by the Madness system | Cross-verify; hold your noise | None (a system threat, not a kill target) |
| Teammate revivals | Downed teammates turning corrupted | Deal with them decisively; no hesitation over old bonds | None |
Universal Engagement Principles#
| Principle | Why |
|---|---|
| Noise comes first | Running, firing, and wearing armor all draw attention — plan your extraction route before you commit |
| Ammo is life insurance | Powder and supplies are finite; suppression fire is not the answer here |
| Extraction over kills | Getting back to the ship Tempestad in time usually matters more than clearing every enemy |
| Practice spear headshots | One Clean Throw and Aim True prove headshots are a dependable kill |
| Interrupt over damage | The Just in Time window is razor thin — when a teammate is grabbed, drop all damage and interrupt |
| Lure instead of forcing | Black Ichor pulls creatures into one spot; bypassing or bunching them beats scattered fights on ammo |
Why There’s No “Boss Drop Table” on This Page#
Two reasons. First, gear in this game comes from pacts and extraction settlements, not monster drops (see Items & Equipment), so the “farm bosses for loot” mindset doesn’t apply. Second, drop rates are unpublished information. Old tables like “the Warden drops Stone Shield at a 15% rate” had no source whatsoever — trust what you see in-game.
Encounter Decision Chain#
Once a threat is spotted, work through these checks in order to avoid most rookie mistakes:
- First ask: “Did every teammate see it?” The answer decides whether it’s corporeal or a hallucination.
- If it’s corporeal, weigh whether it’s worth fighting: Y’m-bhi can be silently solved with a spear, while a Bandurria means measuring the distance first.
- Decided to fight? Fix your extraction direction first. Decided against? Hold your noise and go around.
- If someone goes down mid-fight, switch immediately to rescue decisions: commit to the rescue or commit to leaving — don’t sit in between.
Achievement-Oriented Practice#
- Aim True (50 headshots): treat every expedition as range time. Spear headshots cost no powder — the cheapest kill in the game.
- Just in Time: take the overwatch slot when you squad up. Watching a teammate’s back is worth more than staring at a health bar.
- Long Shot: don’t rush a Bandurria with melee to force it down — open the distance first. The 50-meter requirement actually makes it one of the most ammo-friendly achievements.
- Like Moths to a Flame: pop one lure canister to bunch the creatures up, then clear them in one go along your extraction route — cheaper on time and ammo than piecemeal encounters.
Related Pages#
- Combat Techniques: noise management and weapon choices
- Items & Equipment: how to get Black Ichor and the pact gear loop
- Achievements Guide: a plan for all 25 achievements
- Beginner’s Guide: what to prepare before your first enemy encounter