Trample Devastating Charge — Other creatures you control have trample.

Flying Ward—Pay 2 life. Whenever an opponent loses life for the first time during each of their turns, put a +1/+1 counter on Valgavoth and draw a card.

Flying Whenever another nontoken creature you control dies, you may exile it. If you do, create a token that's a copy of that creature, except it's 1/1 and it's a Nightmare in addition to its other types.

Flying Rot Fly — If an opponent would gain life, that player loses that much life instead.

Menace Equipped creature has base power and toughness 5/5, has menace, and is a black Demon in addition to its other colors and types. Reconfigure {2}{B}{B} ({2}{B}{B}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

Lifelink Devourer of Souls — Whenever another creature dies, put a +1/+1 counter on this creature.

First strike, deathtouch This creature can only attack alone. Whenever this creature attacks a player and isn't blocked, that player's life total becomes 1. This creature assigns no combat damage this combat.

Spectacle {3}{B}{R} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.) When this creature enters, if its spectacle cost was paid, each opponent discards 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.

Reverberating Summons — At the beginning of your end step, each opponent loses 2 life. Then for each opponent who has less life than you, create a 1/3 black Demon creature token named Plaguebearer of Nurgle.

Flying If an opponent would lose life during your turn, they lose twice that much life instead. (Damage causes loss of life.)

Locus of Slaanesh — Demon spells you cast cost {2} less to cast. Other Demons you control have haste.

Flying When this creature enters, search your library for a card, put it into your hand, then shuffle.