(: Add or to your mana pool.)
When Leechridden Oasis enters the battlefield, sacrifice it unless you pay 3 life.
, , Sacrifice Leechridden Oasis: Put a -1/-1 counter on target creature.
, , Sacrifice Leechridden Oasis: Destroy target enchantment.
: Add 
or 
to your mana pool.), , Sacrifice Leechridden Oasis: Put a -1/-1 counter on target creature., , Sacrifice Leechridden Oasis: Destroy target enchantment.
