MTG

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...

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 their libr...

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 ...

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

{B/G}{B/G}: Exile target card from a graveyard. You gain 1 life.

{T}: Target red or green creature gets -2/-0 until end of turn.

Flying {U/R}: Talonrend gets +1/-1 until end of turn.

{1}{U}, {T}: Return target creature with a counter on it to its owner's hand.

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

Counter target spell. Its controller draws a card. Draw a card.

At the beginning of your upkeep, return a permanent you control to its owner's hand.

{3}: Target blue creature gains shroud until end of turn. (It can't be the target of spells or abilities.)

Whenever you cast a spell, equipped creature gets +2/+2 until end of turn. Equip {2}

{2}: Target red creature gains haste until end of turn.

Until end of turn, target creature gains "{T}: Return target nonland permanent to its owner's hand."

{3}: Target green creature gets +1/+1 until end of turn.

{2}: Target black creature gains wither until end of turn. (It deals damage to creatures in the form of -1/-1 counters.)

{2}: Target white creature gains persist until end of turn. (When it dies, if it had no -1/-1 counters on it, return it to the battlefield under it...

When Wistful Selkie enters the battlefield, draw a card.