First strikeThreshold — As long as seven or more cards are in your graveyard, Possessed Barbarian gets +1/+1, is black, and has ", : Destroy target red creature."
FlyingThreshold — As long as seven or more cards are in your graveyard, Possessed Aven gets +1/+1, is black, and has ", : Destroy target blue creature."
Choose target instant or sorcery spell that targets only a single permanent or player. Copy that spell for each other permanent or player the spell could target. Each copy targets a different one of those permanents and players.
Protection from blackThreshold — Nantuko Blightcutter gets +1/+1 for each black permanent your opponents control as long as seven or more cards are in your graveyard.
As an additional cost to cast this spell, discard X cards at random.Each player sacrifices X lands of their choice. Devastating Dreams deals X damage to each creature.
Enchant creatureEnchanted creature gets +2/+1 and has protection from white.Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)
When Mesmeric Fiend enters, target opponent reveals their hand and you choose a nonland card from it. Exile that card.When Mesmeric Fiend leaves the battlefield, return the exiled card to its owner's hand.
Violent Eruption deals 4 damage divided as you choose among any number of targets.Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)
When Faceless Butcher enters, exile another target creature.When Faceless Butcher leaves the battlefield, return the exiled card to the battlefield under its owner's control.
Threshold — As long as seven or more cards are in your graveyard, Cephalid Sage has "When Cephalid Sage enters, draw three cards, then discard two cards."
VigilanceThreshold — As long as seven or more cards are in your graveyard, Reborn Hero has "When Reborn Hero dies, you may pay . If you do, return Reborn Hero to the battlefield under your control."
Enchant creatureEnchanted creature has ": This creature gets +1/+1 until end of turn."When enchanted creature dies, return that card to the battlefield under your control.
For each creature token on the battlefield, its controller creates a token that's a copy of that creature.Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)