Lightning-Rig Crew + Malcolm, Keen-Eyed Navigator + Umbral Mantle

UR identity

Commander legal

The 3 combo pieces

• Lightning-Rig Crew
• Malcolm, Keen-Eyed Navigator
• Umbral Mantle

What must be in place

Umbral Mantle attached to Lightning-Rig Crew.
Lightning-Rig Crew does not have summoning sickness.
You have at least three opponents.

How to execute it

1. Activate Lightning-Rig Crew by tapping it, dealing 1 damage to each opponent.
2. Malcolm triggers, creating a Treasure artifact token for each opponent dealt damage this way.
3. Activate three Treasures by tapping and sacrificing them, adding {3}.
4. Activate Lightning-Rig Crew by paying {3} and untapping it, giving it +2/+2 until end of turn.
5. Repeat until you have two or less opponents remaining.

What the combo produces

• Infinite damage to one opponent
• Near-infinite damage to most opponents
• Near-infinitely large creature until end of turn