Whenever an opponent casts a spell, that player loses 5 life unless they discard a card.
Landfall — Whenever a land you control enters, you may have target player lose 3 life. If you do, put three +1/+1 counters on Ob Nixilis, the Fallen. 3/3
Menace (This creature can’t be blocked except by two or more creatures.) When Relentless Dead dies, you may pay {B}. If you do, return it to its owner’s hand. When Relentless Dead dies, you may pay {X}. If you do, return another target Zombie creature card with mana value X from your graveyard to the battlefield. 2/2
Equipped creature gets +2/+0 and has deathtouch. {5}{B}{B}{B}: Until end of turn, Vorpal Sword gains “Whenever equipped creature deals combat damage to a player, that player loses the game.” Equip {B}{B}
You may pay {W}{U}{B}{R}{G} rather than pay this spell’s mana cost. Trample At the beginning of your upkeep, you may pay 2 life. If you do, search your library for a card, then shuffle and put that card on top. 5/5
Whenever a creature dies, if it had a -1/-1 counter on it, put a -1/-1 counter on target creature.
Flying, trample You can’t win the game and your opponents can’t lose the game. 6/6
Sacrifice a creature, Return Recurring Nightmare to its owner’s hand: Return target creature card from your graveyard to the battlefield. Activate only as a sorcery.
As an additional cost to cast this spell, sacrifice an artifact or creature. Draw two cards and create a Treasure token. (It’s an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
Whenever you cycle or discard a card, you may pay {1}. If you do, each opponent loses 2 life and you gain 2 life.
Swampwalk (This creature can’t be blocked as long as defending player controls a Swamp.) Cycling—Pay 2 life. (Pay 2 life, Discard this card: Draw a card.) 3/4
Black creatures you control have wither. (They deal damage to creatures in the form of -1/-1 counters.) 1/3
{T}, Exile an Assassin card from your graveyard: Destroy target creature. 2/2
When Gray Merchant of Asphodel enters, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.) 2/4
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