Arctic Jelly

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

Spider Climb. The jelly can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Disguise. The jelly can disguise itself as ice whenever it choses.

Pseudopod. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 9 (2d6 + 2) bludgeoning damage plus 3 (1d6) acid damage.

Ice Shard. Melee Weapon Attack: +6 to hit, reach 10 ft, multiple targets is they are within 3 feet of each other. Hit: 7 (1d4 + 2) piercing damage plus 2 (1d4) cold damage

Freeze. When a jelly is hit by a piercing weapon, it turns to ice, halving the damage. The jelly can do this once per round.