Bloatfly Swarm
From Fallout set
Bloatfly Swarm
Creature — Insect Mutant
0/0
Flying
This creature enters with five +1/+1 counters on it.
If damage would be dealt to this creature while it has a +1/+1 counter on it, prevent that damage, remove that many +1/+1 counters from it, then give each player a rad counter for each +1/+1 counter removed this way.
