(: Add or to your mana pool.)
River Hollow enters the battlefield tapped.
, , Sacrifice River Hollow: Return target creature you control to its owner's hand.
, : Target land becomes a 3/3 black Zombie creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.), , Sacrifice River Hollow: Return target creature you control to its owner's hand.
, : Target land becomes a 3/3 black Zombie creature until end of turn. It's still a land.
