Bill

Friendship—{t}: Put a -1/-1 counter on target
opponent's creature. It's controller may spend {2} at any time to remove it.
When Bill uses Friendship for the third time put
a Massacre counter on Bill (At any time you may
remove this counter to kill all other creatures in play).
—
"Nyah nyah, look at the goat boy!! What a loser...
wait, what the... Ahh, RUN!!"