(: Add or to your mana pool.)
Grassy Coliseum enters the battlefield tapped.
, , Sacrifice Grassy Coliseum: Destroy target artifact.
, : Target land becomes a 3/3 blue Merfolk creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.), , Sacrifice Grassy Coliseum: Destroy target artifact.
, : Target land becomes a 3/3 blue Merfolk creature until end of turn. It's still a land.
