War of the Spark

Bleeding Edge | Sorcery | | Up to one target creature gets -2/-2 until end of turn. Amass 2. (Put two +1/+1 counters on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.) | Mike Bierek

Davriel, Rogue Shadowmage | Legendary Planeswalker | Davriel | At the beginning of each opponent's upkeep, if that player has one or fewer cards in hand, Davriel, Rogue Shadowmage deals 2 damage to them. −1: Target player discards a card. | Daarken

Deliver Unto Evil | Sorcery | | Choose up to four target cards in your graveyard. If you control a Bolas planeswalker, return those cards to your hand. Otherwise, an opponent chooses two of them. Leave the chosen cards in your graveyard and put the rest into your hand. Exile Deliver Unto Evil. | Seb McKinnon

Ob Nixilis's Cruelty | Instant | | Target creature gets -5/-5 until end of turn. If that creature would die this turn, exile it instead. | Igor Kieryluk

Shriekdiver | Creature | Zombie Bird Warrior | Flying {1}: Shriekdiver gains haste until end of turn. | Piotr Dura

Spark Reaper | Creature | Zombie | {3}, Sacrifice a creature or planeswalker: You gain 1 life and draw a card. | Zoltan Boros

Toll of the Invasion | Sorcery | | Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. Amass 1. (Put a +1/+1 counter on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.) | Joe Slucher

Vizier of the Scorpion | Creature | Zombie Wizard | When Vizier of the Scorpion enters the battlefield, amass 1. (Put a +1/+1 counter on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.) Zombie tokens you control have deathtouch. | Zack Stella

Vraska's Finisher | Creature | Gorgon Assassin | When Vraska's Finisher enters the battlefield, destroy target creature or planeswalker an opponent controls that was dealt damage this turn. | Igor Kieryluk

Oath of Kaya | Legendary Enchantment | | When Oath of Kaya enters the battlefield, it deals 3 damage to any target and you gain 3 life. Whenever an opponent attacks a planeswalker you control with one or more creatures, Oath of Kaya deals 2 damage to that player and you gain 2 life. | Wesley Burt

Gleaming Overseer | Creature | Zombie Wizard | When Gleaming Overseer enters the battlefield, amass 1. (Put a +1/+1 counter on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.) Zombie tokens you control have hexproof and menace. | Volkan Baǵa

Ashiok, Dream Render | Legendary Planeswalker | Ashiok | Spells and abilities your opponents control can't cause their controller to search their library. −1: Target player mills four cards. Then exile each opponent's graveyard. | Cynthia Sheppard

Mayhem Devil | Creature | Devil | Whenever a player sacrifices a permanent, Mayhem Devil deals 1 damage to any target. | Dmitry Burmak

Leyline Prowler | Creature | Nightmare Beast | Deathtouch, lifelink {T}: Add one mana of any color. | YW Tang