(: Add or to your mana pool.)
Dragonskull Steppe enters the battlefield tapped.
: Dragonskull Steppe becomes a 2/1 black and green Zombie creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Dragonskull Steppe becomes a 2/1 black and green Zombie creature until end of turn. It's still a land.
