Gearmass 2014

CR 5 ooze

Large ooze, unaligned

Armor Class: 15 (natural armor)
Hit Points: 115 (11d10+55)
Speed: 20 ft., swim 20 ft.

STR16 (+3)

DEX5 (-3)

CON20 (+5)

INT1 (-5)

WIS6 (-2)

CHA1 (-5)

Saving Throws
Skills: Perception -2
Vulnerabilities: cold
Damage Immunities: acid, fire
Condition Immunities: blinded, charmed, deafened, exhaustion, frightened, prone
Senses: blindsight 60 ft., passive Perception 8
Languages: —
Challenge: 5 (1,800 XP) · Proficiency Bonus +3

Amorphous.

Move through space 1ft.+ wide with o squeezing.

Clanging Mass.

Is filled with metal objects that clang scrape and clink together as it moves. When it moves it has disadvantage on Dex (Stealth) checks to stay silent until start of its next turn.

Ooze Nature.

Doesn’t require sleep.

Rust Metal.

Any nonmagic metal weapon that hits gearmass corrodes. After dealing damage weapon: permanent cumulative –1 penalty to damage. If penalty drops to –5 destroyed. Nonmagic metal ammo that hits gearmass destroyed after dealing damage.

Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details