Relentless Assault + Helm of the Host + Nature's Will + Returned Pastcaller
Relentless Assault
Helm of the Host
Nature's Will
Returned Pastcaller
Infinite creature ETBInfinite combat phasesInfinite mana lands you control can produceInfinite creature tokens with hasteInfinite magecraft triggersInfinite combat damageInfinite storm countInfinite untap of lands you control
How it works
Activate any number of lands by tapping them, adding at least 2.
Cast Relentless Assault by paying 2, causing you to untap all creatures that attacked this turn and causing you to get an additional combat and main phase after this one.
At the beginning of your combat phase, Helm of the Host triggers, creating a token copy of Returned Pastcaller with haste.
When the Returned Pastcaller token enters, it triggers, returning Relentless Assault from your graveyard to your hand.
Deal combat damage to an opponent. Nature's Will triggers, untapping all lands you control.
Move to your next main phase and repeat from step 1.