Boxing Day

When Myr Moonvessel dies, add {C}.

Whenever Gemini Engine attacks, create a colorless Construct artifact creature token named Twin that's attacking. Its power is equal to Gemini Engi...

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Flying, trample When Eater of Days enters the battlefield, you skip your next two turns.

Players skip their upkeep steps.

{T}: Add {G}. {T}: Target 1/1 creature gets +1/+2 until end of turn.

Whenever a player casts a red spell, you may gain 1 life.

{T}: Create a 1/1 colorless Myr artifact creature token. {T}, Tap five untapped Myr you control: Search your library for a Myr creature card, put i...

When you cast this spell, destroy target permanent. Indestructible Annihilator 4 (Whenever this creature attacks, defending player sacrifices four ...

{3}: Ensouled Scimitar becomes a 1/5 Spirit artifact creature with flying until end of turn. (Equipment that's a creature can't equip a creature.) ...

When Peace Strider enters the battlefield, you gain 3 life.

Gemstone Mine enters the battlefield with three mining counters on it. {T}, Remove a mining counter from Gemstone Mine: Add one mana of any color. ...

Affinity for Swamps (This spell costs {1} less to cast for each Swamp you control.) Fear (This creature can't be blocked except by artifact creatu...

{T}: Add {C}. {T}: Desert deals 1 damage to target attacking creature. Activate only during the end of combat step.

Imprint — {T}: Exile target artifact card from a graveyard. Myr Welder has all activated abilities of all cards exiled with it.

Sunburst (This enters the battlefield with a charge counter on it for each color of mana spent to cast it.) {2}, Sacrifice Engineered Explosives: D...

Flying Drill-Skimmer has shroud as long as you control another artifact creature. (It can't be the target of spells or abilities.)

{3}, {T}: Tap target creature you control and target creature of an opponent's choice they control. Those creatures fight each other. (Each deals d...

At the beginning of your upkeep, choose one — • Put a +1/+1 counter on target artifact creature. • Put a charge counter on target noncreature artif...

When Myr Sire dies, create a 1/1 colorless Phyrexian Myr artifact creature token.

Whenever a player casts a black spell, you may gain 1 life.

{3}: Target creature gains islandwalk until end of turn. When War Barge leaves the battlefield this turn, destroy that creature. A creature destroy...

{3}, {T}: Double the amount of each type of unspent mana you have.

Door to Nothingness enters the battlefield tapped. {W}{W}{U}{U}{B}{B}{R}{R}{G}{G}, {T}, Sacrifice Door to Nothingness: Target player loses the game.