Tisha, Foulblooded Barbarian

Trample, Haste
At the end of your turn, if Tisha attacked this turn, put a +1/+1 counter on it, then it deals damage equal to the number of counters on it to up to one creature.
At the end of your turn, if Tisha didnt attack this turn, remove a +1/+1 counter from it.
"No time to speak. Kill!"