Boxing Day

Whenever one or more creatures you control deal combat damage to a player, tap all lands that player controls and untap all lands you control.

{R}: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the nex...

Other enchantments you control have shroud. (A permanent with shroud can't be the target of spells or abilities.) Enchanted creatures you control h...

Whenever you gain life, target opponent loses that much life.

Whenever a land enters the battlefield under an opponent's control, that player loses 2 life and you gain 2 life.

You may cast spells from your hand without paying their mana costs.

If Leyline of Anticipation is in your opening hand, you may begin the game with it on the battlefield. You may cast spells as though they had flash.

Creatures don't untap during their controllers' untap steps. Whenever a creature enters the battlefield, untap all creatures.

At the beginning of your upkeep, put a time counter on As Foretold. Once each turn, you may pay {0} rather than pay the mana cost for a spell you c...

You don't lose the game for having 0 or less life. As long as you have 0 or less life, all damage is dealt to you as though its source had infect. ...

{R}: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the nex...

Whenever a creature is dealt damage, Repercussion deals that much damage to that creature's controller.

Nonbasic lands are Mountains.

{3}{R}{R}: Untap all creatures you control. After this main phase, there is an additional combat phase followed by an additional main phase. Activa...

Whenever a land enters the battlefield under an opponent's control, that player loses 2 life and you gain 2 life.

Skip your draw step. Whenever you discard a card, exile that card from your graveyard. Pay 1 life: Exile the top card of your library face down. Pu...

Whenever a creature you control dies, each other player sacrifices a creature.

At the beginning of your upkeep, you lose 1 life and create a 1/1 black Faerie Rogue creature token with flying.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

You may cast spells from your hand without paying their mana costs.

At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal ...

As Kindred Discovery enters the battlefield, choose a creature type. Whenever a creature you control of the chosen type enters the battlefield or a...

At the beginning of your upkeep, put a time counter on As Foretold. Once each turn, you may pay {0} rather than pay the mana cost for a spell you c...

Whenever an opponent draws a card, that player may pay {2}. If the player doesn't, you create a Treasure token. (It's an artifact with "{T}, Sacrif...