(: Add or to your mana pool.)
Hollow Oasis enters the battlefield tapped.
, , Sacrifice Hollow Oasis: Put a -1/-1 counter on target creature.
, : Target land becomes a 2/2 green Leech creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.), , Sacrifice Hollow Oasis: Put a -1/-1 counter on target creature.
, : Target land becomes a 2/2 green Leech creature until end of turn. It's still a land.
