Sword of Feast and Famine + Sword of Hearth and Home + Archaeomancer + Relentless Assault
Sword of Feast and Famine
Sword of Hearth and Home
Archaeomancer
Relentless Assault
Infinite combat damageInfinite combat phasesInfinite creature ETBInfinite creature LTBInfinite magecraft triggersInfinite storm countNear-infinite landfall triggersPut all basic lands from your library onto the battlefieldInfinite mana lands you control can produceInfinite untap of lands you control
How it works
Deal combat damage to an opponent using the creature with Sword of Hearth and Home attached.
Sword of Hearth and Home and Sword of Feast and Famine trigger.
Resolve the Sword of Hearth and Home trigger, blinking Archaeomancer and causing you to search your library for a basic land card and put it onto the battlefield.
Archaeomancer enters the battlefield, returning Relentless Assault from your graveyard to your hand.
Resolve the Sword of Feast and Famine trigger, causing you to untap all lands you control, and causing the defending player to discard a card.
Move to your postcombat main phase.
Activate any number of lands you control by tapping them, adding at least 2.
Cast Relentless Assault by paying 2, causing you to untap all creatures that attacked this turn and to get an additional combat and main phase after this one.