When Dreadship Slagheap enters the battlefield, sacrifice it unless you pay .
: Add to your mana pool. Return Dreadship Slagheap to its owner's hand.
: Dreadship Slagheap becomes a 2/2 black Rat creature until end of turn. It's still a land.
.
: Add 
to your mana pool. Return Dreadship Slagheap to its owner's hand.
: Dreadship Slagheap becomes a 2/2 black Rat creature until end of turn. It's still a land.
