Kirin

{r}{r}: Monstrosity 2.
At the beginning of each upkeep, put a charge counter on Kirin.
Kirin gets +0/+1 for each charge counter on it.
At the beginning of your end step, remove all charge counters from Kirin. It deals damage to target creature equal to the number of charge counters removed this way. If Kirin is monstrous, you may choose how many charge counters to remove from Kirin.