Boxing Day

{3}, {T}: The next time a source of your choice would deal damage to you this turn, that damage is dealt to target creature of an opponent's choice...

{4}, {T}: For one spell this turn, you may spend mana as though it were mana of any type to pay that spell's mana cost. (Additional costs are still...

{T}, Sacrifice Mirror Universe: Exchange life totals with target opponent. Activate this ability only during your upkeep.

All Walls able to block Marble Priest do so. Prevent all combat damage that would be dealt to Marble Priest by Walls.

Instant and enchantment spells you cast cost up to {2} less to cast.

{4}, {T}: Put a matrix counter on target creature and that creature gains "Remove a matrix counter from this creature: Regenerate this creature." A...

Sacrifice a creature: You gain life equal to the sacrificed creature's toughness. Activate this ability only during your upkeep.

{2}, {T}: Prevent all damage that would be dealt this turn by target creature you control. That creature gets +0/+X until end of turn, where X is i...

{2}, {T}: Exile the top card of your library face down. {0}: Sacrifice Knowledge Vault. If you do, discard your hand, then put all cards exiled wit...

As long as Winter Orb is untapped, players can't untap more than one land during their untap steps.

{2}, {T}: Prevent all combat damage that would be dealt by target creature this turn.

Whenever a player casts a black spell, you may pay {1}. If you do, you gain 1 life.

{2}, {T}: Put a charge counter on Green Mana Battery. {T}, Remove any number of charge counters from Green Mana Battery: Add {G}, then add an addit...

{5}, Sacrifice Gauntlets of Chaos: Exchange control of target artifact, creature, or land you control and target permanent an opponent controls tha...

As The Rack enters the battlefield, choose an opponent. At the beginning of the chosen player's upkeep, The Rack deals X damage to that player, whe...

Whenever a player casts a green spell, you may pay {1}. If you do, you gain 1 life.

As this artifact enters, choose two colors. Whenever you cast a spell, if it's at least one of the chosen colors, you gain 1 life for each of the c...

At the beginning of each opponent's upkeep, exile all cards from your hand face down. At the beginning of your upkeep, return all cards you own exi...

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

Whenever a nonartifact permanent you control enters, you may return another permanent you control that shares a permanent type with it to its owner...

Whenever an ability of equipped creature is activated, if it isn't a mana ability, copy that ability. You may choose new targets for the copy. Equi...

All damage that would be dealt to you is dealt to equipped creature instead. Equip {3}

As this artifact enters, choose two colors. Each spell you cast costs {1} less to cast for each of the chosen colors it is.

As long as equipped creature is tapped, tapped creatures you control get +2/+0. As long as equipped creature is untapped, untapped creatures you co...