Lightning-Rig Crew Combos
Malcolm, Keen-Eyed Navigator + Lightning-Rig Crew + Clock of Omens
Malcolm, Keen-Eyed Navigator + Lightning-Rig Crew + Crab Umbra
Malcolm, Keen-Eyed Navigator + Lightning-Rig Crew + Freed from the Real
Malcolm, Keen-Eyed Navigator + Lightning-Rig Crew + Pemmin's Aura
Malcolm, Keen-Eyed Navigator + Lightning-Rig Crew + Sword of the Paruns
Malcolm, Keen-Eyed Navigator + Lightning-Rig Crew + Umbral Mantle
Combo result
Infinite damage to target opponent. Near-infinite damage to all other opponents. Near-infinitely large Lightning-Rig Crew until end of turn.
Prerequisites
All permanents on the battlefield. Umbral Mantle attached to Lightning-Rig Crew. Lightning-Rig Crew does not have summoning sickness. You have at least three opponents.