(: Add or to your mana pool.)
When Grave Vents enters the battlefield, return a land you control to its owner's hand.
, , Sacrifice Grave Vents: Put a -1/-1 counter on target creature.
, : Draw a card, then discard a card.
: Add 
or 
to your mana pool.), , Sacrifice Grave Vents: Put a -1/-1 counter on target creature.
, : Draw a card, then discard a card.
