Ballooze

Pop! The ballooze explodes when it drops to 0 hit points or dies. When it does so, it causes one of the following effects of its choice.
• Laughing Gas. Each enemy creature within 20 ft. of the ballooze when it explodes must succeed on a DC 14 Wisdom saving throw or begin laughing uncontrollably. A creature so laughing cannot take bonus actions or reactions and must succeed on a DC 14 Constitution ability check to take actions that involve speaking (such as when casting a spell with a verbal component). An impacted creature can attempt a DC 14 Wisdom saving throw at the end of each of its turns, ending the effect on a success.
• Party Slime. Each creature within 20 ft. of the ballooze when this occurs must succeed on a DC 14 Dexterity saving throw or be coated in a poisonous pink slime. A creature so coated takes 7 (2d6) poison damage at the start of each of its turns and has disadvantage on Strength attack rolls and ability checks. A creature so coated can remove the pink slime by immersing itself in water or using an action to wipe it off.

Acid Sputter. Melee Spell Attack: +0 to hit, reach 5 ft. one creature. Hit: 4 (1d8) poison damage.
Detonate. The ballooze dies, and the radius of the area affected by its Pop! feature is doubled.