Red Balloons

Enchant target creature
Put 3 Balloon counters on target creature.
Whenever enchanted creature is dealt damage or
deals damage, remove a Balloon counter. When
target creature has 0 Balloon counters, sacrifice it.
"I bet I can cheer him up! I'll give him a balloon. Do
you want a balloon too, Georgie?" -Pennywise,
IT Pt. I (2017)