Boxing Day

Trample Whenever Living Hive deals combat damage to a player, create that many 1/1 green Insect creature tokens.

Sacrifice an artifact: Krark-Clan Shaman deals 1 damage to each creature without flying.

Sacrifice an artifact: Krark-Clan Grunt gets +1/+0 and gains first strike until end of turn.

First strike, haste

Sacrifice an artifact: Thermal Navigator gains flying until end of turn.

As long as Leonin Den-Guard is equipped, it gets +1/+1 and has vigilance.

When you control no other artifacts, sacrifice Synod Centurion.

Imprint — When Summoner's Egg enters the battlefield, you may exile a card from your hand face down. When Summoner's Egg dies, turn the exiled card...

Sacrifice an artifact: Atog gets +2/+2 until end of turn.

Sunburst (This enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it.) Remove two +1/+1 counters from Spinal Pa...

{R}, Exile the top ten cards of your library: Arc-Slogger deals 2 damage to any target.

Sunburst (This enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it.) Flying

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) Whenever Woebearer deals combat damage to a player, you ...

Whenever an artifact enters the battlefield, Vermiculos gets +4/+4 until end of turn.

Flying, vigilance (This creature can't be blocked except by creatures with flying or reach, and attacking doesn't cause this creature to tap.)

Whenever Slith Bloodletter deals combat damage to a player, put a +1/+1 counter on it. {1}{B}: Regenerate Slith Bloodletter.

Sunburst (This enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it.) Remove two +1/+1 counters from Sawtooth ...

Flying Nim Shrieker gets +1/+0 for each artifact you control.

Nim Shambler gets +1/+0 for each artifact you control. Sacrifice a creature: Regenerate Nim Shambler.

Nim Lasher gets +1/+0 for each artifact you control.

First strike (This creature deals combat damage before creatures without first strike.) At the beginning of your upkeep, sacrifice Razormane Mastic...

Nim Devourer gets +1/+0 for each artifact you control. {B}{B}: Return Nim Devourer from your graveyard to the battlefield, then sacrifice a creatur...

Defender (This creature can't attack.) Razorgrass Screen blocks each combat if able.

When Moriok Scavenger enters the battlefield, you may return target artifact creature card from your graveyard to your hand.