(: Add or to your mana pool.)
Whenever Graven Swamp becomes tapped, it deals 1 damage to you.
: Graven Swamp becomes a 2/1 red and black Goblin Elemental creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Graven Swamp becomes a 2/1 red and black Goblin Elemental creature until end of turn. It's still a land.
