Eventide

Haste Chroma — When Heartlash Cinder enters the battlefield, it gets +X/+0 until end of turn, where X is the number of red mana symbols in the mana...

Wither (This deals damage to creatures in the form of -1/-1 counters.) {2}{R}, {Q}: Hateflayer deals damage equal to its power to any target. ({Q} ...

{2}{R}, {T}, Put a -1/-1 counter on a creature you control: Hatchet Bully deals 2 damage to any target.

Flame Jab deals 1 damage to any target. Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its oth...

Chroma — {2}, Sacrifice a creature: Fiery Bombardment deals damage to any target equal to the number of red mana symbols in the sacrificed creature...

Wither (This deals damage to creatures in the form of -1/-1 counters.) {R/W}: Duergar Cave-Guard gets +1/+0 until end of turn.

{T}: Cinder Pyromancer deals 1 damage to target player or planeswalker. Whenever you cast a red spell, you may untap Cinder Pyromancer.

Prevent all damage that would be dealt to you and permanents you control this turn.

Chaotic Backlash deals damage to target player equal to twice the number of white and/or blue permanents they control.

Chroma — Umbra Stalker's power and toughness are each equal to the number of black mana symbols in the mana costs of cards in your graveyard.

Target opponent reveals their hand. You choose a green or white creature card from it. You gain life equal to that creature card's toughness, then ...

Target player loses 2 life and you gain 2 life. Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying...

When Soul Snuffers enters the battlefield, put a -1/-1 counter on each creature.

Destroy target nongreen creature. Its controller loses 3 life if you've cast another black spell this turn.

Flying Whenever a player casts a nonblack spell, that player loses 1 life.

Wither (This deals damage to creatures in the form of -1/-1 counters.)

Target player discards a card. Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Search target player's library for up to X cards, where X is the number of Swamps you control, and exile them. Then that player shuffles.

When Endless Horizons enters the battlefield, search your library for any number of Plains cards, exile them, then shuffle. At the beginning of you...

Flying Wither (This deals damage to creatures in the form of -1/-1 counters.) Whenever Needle Specter deals combat damage to a player, that player ...

Wither (This deals damage to creatures in the form of -1/-1 counters.) Whenever a creature an opponent controls with a -1/-1 counter on it dies, yo...

{T}: Target player exiles a card from their graveyard. Whenever you cast a black spell, you may untap Merrow Bonegnawer.

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) Persist (When this creature dies, if it had no -1/-1 co...

At the beginning of your upkeep, destroy target creature with a -1/-1 counter on it.