Gore-rilla

Whenever Gore-rilla becomes blocked by one or
more creatures, their controllers must sacrifice
them.
Sacrifice a creature: Gore-rilla gains haste until
end of turn. If this is the second time this ability
has been activated it gains trample until end of
turn. If this is the third time, it gains doublestrike
until end of turn. If this is the fourth time, it
gains +4/+4, menace, and indestructible until
end of turn.