Winds of Mutation

Put two +1/+1 counters on each creature for each activated ability it has. Then each creature has
base power and toughness 0/0. (This effect lasts indefinitely.)
Flashback - {b}{g}{u}, Sacrifice three creatures
with base power and toughness 0/0. (You may
cast this card from your graveyard for its flashback
cost. Then exile it.)

"I have no clue what just happened."
- Izzet Guildmage