Grave Clump enters the battlefield tapped.
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
: Grave Clump becomes a 2/2 black and green Skeleton creature with trample until end of turn. It's still a land.
: Add 
to your mana pool. If you played a land this turn, Add 
to your mana pool instead.
: Grave Clump becomes a 2/2 black and green Skeleton creature with trample until end of turn. It's still a land.
