Boxing Day

At the beginning of each player's upkeep, Power Surge deals X damage to that player, where X is the number of untapped lands they controlled at the...

Destroy target artifact or enchantment.

{T}: Orcish Artillery deals 2 damage to any target and 3 damage to you.

Whenever Mijae Djinn attacks, flip a coin. If you lose the flip, remove Mijae Djinn from combat and tap it.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Regenerate target creature.

Flying {R}: Granite Gargoyle gets +0/+1 until end of turn.

Other Goblin creatures get +1/+1 and have mountainwalk. (They can't be blocked as long as defending player controls a Mountain.)

Copy target instant or sorcery spell, except that the copy is red. You may choose new targets for the copy.

Destroy all Plains.

This spell costs {1} more to cast for each target beyond the first. Fireball deals X damage divided evenly, rounded down, among any number of targets.

White creatures get +1/+1.

Earthquake deals X damage to each creature without flying and each player.

All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay {2}."

Target player activates a mana ability of each land they control. Then that player loses all unspent mana and you add the mana lost this way.

Enchant creature When enchanted creature dies, Creature Bond deals damage equal to that creature's toughness to the creature's controller.

Counter target spell.

You may have Copy Artifact enter the battlefield as a copy of any artifact on the battlefield, except it's an enchantment in addition to its other ...

Enchant creature You control enchanted creature.