Boxing Day

At the beginning of each player's end step, if no creatures attacked this turn, that player sacrifices a creature of their choice that they control...

Menace, lifelink Whenever a historic creature you control deals combat damage to a player, create a 1/1 black Assassin creature token with menace. ...

Menace, lifelink Whenever a historic creature you control deals combat damage to a player, create a 1/1 black Assassin creature token with menace. ...

This land doesn't untap during your untap step. At the beginning of your upkeep, you may exile a card from your hand. If you do, untap this land. {...

Search your library for a creature card, reveal that card, put it into your hand, then shuffle.

Domain — This spell costs {2} less to cast for each basic land type among lands you control. Flying Domain — At the beginning of your upkeep, sacri...

As an additional cost to cast this spell, sacrifice a creature. Search your library for a card, put that card into your hand, then shuffle.

At the beginning of each opponent's upkeep, that player loses X life, where X is the number of cards in that player's hand minus the number of card...

First strike; reach (This creature can block creatures with flying.)

Champion an Elf (When this creature enters, sacrifice it unless you exile another Elf you control. When this creature leaves the battlefield, that ...

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) When this creature enters, destroy target nonartifact, n...

Amplify 2 (As this creature enters, put two +1/+1 counters on it for each Beast card you reveal in your hand.) Provoke (Whenever this creature atta...

Incinerate deals 3 damage to any target. A creature dealt damage this way can't be regenerated this turn.

Counter target spell.

{T}: Add {C}.

Lands you control have "{T}: Add one mana of any color." {T}: Add one mana of any color.

You have no maximum hand size. {T}: Add {C}.

Xantcha enters under the control of an opponent of your choice. Xantcha attacks each combat if able and can't attack its owner or planeswalkers its...

This land enters tapped. {T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that s...

You have no maximum hand size. {T}: Add {C}.

Flying Whenever Vorosh deals combat damage to a player, you may pay {2}{G}. If you do, put six +1/+1 counters on Vorosh.

Each land is a Swamp in addition to its other land types.

Flying Whenever Teneb deals combat damage to a player, you may pay {2}{B}. If you do, put target creature card from a graveyard onto the battlefiel...

When you cast this spell, any player may pay half their life, rounded up. If a player does, counter Temporal Extortion. Take an extra turn after th...