Boxing Day

Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.

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

Lightning Bolt deals 3 damage to any target.

Keldon Warlord's power and toughness are each equal to the number of non-Wall creatures you control.

Ironclaw Orcs can't block creatures with power 2 or greater.

At the beginning of your upkeep, sacrifice Conversion unless you pay {W}{W}. All Mountains are Plains.

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.)

{R}: Goblin Balloon Brigade gains flying until end of turn.

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

Destroy all Plains.

Enchant creature {R}: Enchanted creature gets +1/+0 until end of turn.

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.

Enchant land Enchanted land has indestructible and can't be enchanted by other Auras.

Cast this spell only during the declare blockers step. Remove target creature defending player controls from combat. Creatures it was blocking that...

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

Enchant enchantment At the beginning of the upkeep of enchanted enchantment's controller, Feedback deals 1 damage to that player.

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.