61-March, Land of Hives

61-March enters the battlefield tapped unless
you control a Beast

{t}: Add {g} or {b} to your mana pool

{2}{g}{b}: 61-March becomes a black and green 0/5 Insect Beast that says "when this takes damage, create a flying 1/1 Circuit Bee Insect" until end of turn. It's still a land.