Sources
CR
Type
Size
Alignment
Movement

Bag Jelly

Medium Ooze, Unaligned

Armor Class 8
Hit Points 42 (5d8 + 20)
Speed 10 ft., climb 10 ft.
STR
13
+1
DEX
6
-2
CON
19
+4
INT
2
-4
WIS
7
-2
CHA
2
-4
Damage Resistances acid, bludgeoning
Condition Immunities Exhaustion
Senses blindsight 60 ft. (can't see beyond this radius), passive Perception 8
Languages
Challenge 1 (200 XP)

Traits

Amorphous. The bag jelly can move through a space as narrow as 1 inch without squeezing.

Actions

Multiattack. The bag jelly makes two Pseudopod attacks.

Pseudopod. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit:8 (2d6 + 1) acid damage. If the target is a Medium or smaller creature, it has the grappled condition (escape DC 11). Ability checks made to escape this grapple have disadvantage.

Lore

A Dwarvish saga claims bag jellies are the result of a curse laid by Durgrid Bladeforge, who was beaten to death while hiding inside a giant's bag.