Boxing Day

Trample Whenever you cast an instant or sorcery spell, Erratic Cyclops gets +X/+0 until end of turn, where X is that spell's converted mana cost.

Direct Current deals 2 damage to any target. Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its ...

Cosmotronic Wave deals 1 damage to each creature your opponents control. Creatures your opponents control can't block this turn.

Command the Storm deals 5 damage to target creature.

Trample Whenever Book Devourer deals combat damage to a player, you may discard all the cards in your hand. If you do, draw that many cards.

Haste Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

Whenever you surveil for the first time each turn, Whispering Snitch deals 1 damage to each opponent and you gain 1 life.

{1}{B}: Veiled Shade gets +1/+1 until end of turn.

{1}, Sacrifice another creature: Put a +1/+1 counter on Undercity Necrolisk. It gains menace until end of turn. Activate this ability only any time...

When Spinal Centipede dies, put a +1/+1 counter on target creature you control.

As an additional cost to cast this spell, sacrifice a creature. You gain life equal to the sacrificed creature's toughness. Destroy target creature...

Destroy all creatures with converted mana cost 3 or less.

Flying {1}{B}, {T}, Sacrifice Pilfering Imp: Target opponent reveals their hand. You choose a nonland card from it. That player discards that card....

Target opponent reveals their hand. You choose a nonland card from that player's graveyard or hand and exile it.

Undergrowth — Target creature gets -X/-X until end of turn, where X is the number of creature cards in your graveyard. If that creature would die t...

Undergrowth — When Moodmark Painter enters the battlefield, target creature gains menace and gets +X/+0 until end of turn, where X is the number of...

All creatures get -1/-1 until end of turn. Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard a...

Flying {2}{B}, Discard a creature card: Return Kraul Swarm from your graveyard to your hand.

Deathtouch

Choose a creature card with converted mana cost 1 in your graveyard, then do the same for creature cards with converted mana costs 2 and 3. Return ...

Choose one or both — • Exile target artifact. • Exile target enchantment.

Destroy target creature. Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top...

Enchant creature Enchanted creature gets -2/-2.