Charnelhoard Wurm + Great Train Heist + Sozin's Comet
Charnelhoard Wurm
Great Train Heist
Sozin's Comet
Infinite artifact ETBInfinite artifact tokensInfinite storm countInfinite combat phasesInfinite untap of creatures you controlInfinite mana creatures you control can produceInfinite tapped Treasure tokensInfinite magecraft triggersInfinite combat damageInfinitely powerful creatures you control until end of turn
How it works
Cast Sozin's Comet by paying 3.
Declare Charnelhoard Wurm as an attacker, triggering its firebending ability, adding .
Holding priority, cast Great Train Heist by paying 2, selecting its first mode, causing you to untap all creatures you control and get an additional combat phase after this one.
Deal combat damage using Charnelhoard Wurm, triggering its ability, returning Great Train Heist from your graveyard to your hand.