5e Cards
Challenge 1/2: 1/2

Gray Ooze

Medium ooze, unaligned

Armor Class
8
Hit Points
22 (3d8+9)
Speed
10 ft., climb 10 ft.
STR
12 (+1)
DEX
6 (−2)
CON
16 (+3)
INT
1 (−5)
WIS
6 (−2)
CHA
2 (−4)
Skills
Stealth +2
Damage Resistances
acid, cold, fire
Condition Immunities
blinded, charmed, deafened, exhaustion, frightened, prone
Senses
blindsight 60 ft. (blind beyond this radius), passive Perception 8
Languages
—
Challenge
1/2 (100 XP)
Proficiency Bonus
+2

Amorphous. The ooze can move through a space as narrow as 1 inch wide without squeezing.

Corrode Metal. Any nonmagical weapon made of metal that hits the ooze corrodes. After dealing damage, the weapon takes a permanent and cumulative -1 penalty to damage rolls. If its penalty drops to -5, the weapon is destroyed. Nonmagical ammunition made of metal that hits the ooze is destroyed after dealing damage.

The ooze can eat through 2-inch-thick, nonmagical metal in 1 round.

False Appearance. While the ooze remains motionless, it is indistinguishable from an oily pool or wet rock.

Actions

Pseudopod. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) bludgeoning damage plus 7 (2d6) acid damage, and if the target is wearing nonmagical metal armor, its armor is partly corroded and takes a permanent and cumulative -1 penalty to the AC it offers. The armor is destroyed if the penalty reduces its AC to 10.

How many for your party

Copies of the gray ooze (100 XP each) against a party of four characters of the same level. Build mixed fights in the encounter builder.

Number of Gray Ooze for each difficulty, party of four
Party levelEasyMediumHardDeadly
Level 11—23–20
Level 22—34–20
Level 323–45–67–20
Level 43–45–678–20
Level 55–78–1011–1415–20
Level 66–910–1112–1415–20

In these lists

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Questions

What CR is the Gray Ooze?

The Gray Ooze is challenge 1/2, worth 100 XP, with a proficiency bonus of +2.

How many hit points does the Gray Ooze have?

22 hit points (3d8+9), with AC 8.

How many should I use against four 1st-level characters?

Against four level 1 characters, 2 is hard by the encounter XP budget.