Spike Feeder enters with two +1/+1 counters on it., Remove a +1/+1 counter from Spike Feeder: Put a +1/+1 counter on target creature.Remove a +1/+1 counter from Spike Feeder: You gain 2 life.
Crovax the Cursed enters with four +1/+1 counters on it.At the beginning of your upkeep, you may sacrifice a creature. If you do, put a +1/+1 counter on Crovax. If you don't, remove a +1/+1 counter from Crovax.: Crovax gains flying until end of turn.
Skeleton Scavengers enters with a +1/+1 counter on it.Pay for each +1/+1 counter on Skeleton Scavengers: Regenerate Skeleton Scavengers. When it regenerates this way, put a +1/+1 counter on it.
If you would draw a card, you may put a study counter on Pursuit of Knowledge instead.Remove three study counters from Pursuit of Knowledge, Sacrifice Pursuit of Knowledge: Draw seven cards.
Whenever a nontoken permanent is put into your graveyard from the battlefield, Jinxed Ring deals 1 damage to you.Sacrifice a creature: Target opponent gains control of Jinxed Ring. (This effect lasts indefinitely.)
Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)Target land becomes a 2/2 creature that's still a land. (This effect lasts indefinitely.)
Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)Target creature gets +3/+0 until end of turn.
As an additional cost to cast this spell, sacrifice a creature.Search your library for a card with the same name as target nontoken creature, put that card onto the battlefield, then shuffle.
