Bloop

Amorphous. Bloop can move through any space larger than 1 inch without squeezing.

Freezing. If Bloop takes 5 or more cold damage in a single turn or is in freezing temperatures for more than one minute, it becomes petrified until it spends one minute in a warm area or an effect such as the prestidigitation or shape water that can heat or cool a material is used on it. While frozen, Bloop can still speak.

Inconspicuous. When Bloop is stationary, it looks like an ordinary puddle.

Innate Spellcasting. Bloop's innate spellcasting ability is Charisma (Spell save DC 12, +4 to hit with spell attacks). Bloop can cast the following spells requiring no components:

At will: shape water

Elemental Nature. Bloop does not need to eat, sleep, or breathe.

Tendril. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 3 (1d4 + 1) bludgeoning damage.

Bloop is a lesser elemental spirit that can inhabit and control small bodies of water or very small portions of large bodies of water.