Underground Valley enters the battlefield tapped.
: Add or to your mana pool.
Sacrifice Underground Valley: Add or to your mana pool.
: Underground Valley becomes a 2/1 black and green Zombie Cleric creature until end of turn. It's still a land.
: Add 
or 
to your mana pool. or to your mana pool.: Underground Valley becomes a 2/1 black and green Zombie Cleric creature until end of turn. It's still a land.
