Big Bohto

Trample, Mountainwalk.
Whenever a red creature you control enters, it gains Haste and First Strike until end of turn.

Whenever a green creature you control enters, it gains Haste and Trample until end of turn.

Whenever you cast a creature spell, you may pay one mana of that creatures color identity, if you do, put a +1/+1 counter on Big Bohto.