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