War of the Spark

Cruel Celebrant | Creature | Vampire | Whenever Cruel Celebrant or another creature or planeswalker you control dies, each opponent loses 1 life and you gain 1 life. | Bastien L. Deharme

Despark | Instant | | Exile target permanent with mana value 4 or greater. | Slawomir Maniak

Kaya, Bane of the Dead | Legendary Planeswalker | Kaya | Your opponents and permanents your opponents control with hexproof can be the targets of spells and abilities you control as though they didn't have hexproof. −3: Exile target creature. | Magali Villeneuve

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

Tyrant's Scorn | Instant | | Choose one — • Destroy target creature with mana value 3 or less. • Return target creature to its owner's hand. | Svetlin Velinov

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

Angrath's Rampage | Sorcery | | Choose one — • Target player sacrifices an artifact. • Target player sacrifices a creature. • Target player sacrifices a planeswalker. | Victor Adame Minguez

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

Angrath, Captain of Chaos | Legendary Planeswalker | Angrath | Creatures you control have menace. −2: 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.) | Slawomir Maniak

Deathsprout | Instant | | Destroy target creature. Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. | Seb McKinnon

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

Vraska, Swarm's Eminence | Legendary Planeswalker | Vraska | Whenever a creature you control with deathtouch deals damage to a player or planeswalker, put a +1/+1 counter on that creature. −2: Create a 1/1 black Assassin creature token with deathtouch and "Whenever this creature deals damage to a planeswalker, destroy that planeswalker." | Anna Steinbauer