Ebon Praetor

First strike, trample
At the beginning of your upkeep, put a
-2/-2 counter on Ebon Praetor.
Sacrifice a creature: Remove a -2/-2 counter from Ebon Praetor. If the sacrificed creature was a Thrull,
put a +1/+0 counter on Ebon Praetor.
Activate this ability
only during your upkeep and only once each turn.