(: Add or to your mana pool.)
Leechridden Pools enters the battlefield tapped.
: Leechridden Pools becomes a 2/2 black Horror creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
: Leechridden Pools becomes a 2/2 black Horror creature until end of turn. It's still a land.
