Woe Strider + Breach the Multiverse + Dualcaster Mage
Woe Strider
Breach the Multiverse
Dualcaster Mage
Infinite creature LTBInfinite creature ETBInfinite creature sacrifice triggersInfinite death triggersInfinite scry 1Infinite millInfinite self-millPut all creature cards from your library onto the battlefieldInfinite magecraft triggersInfinite recursion of creature cards in your graveyardPut all creature cards from each opponent's library onto the battlefield under your control
How it works
Cast Breach the Multiverse by paying its mana cost, targeting any applicable target.
Holding priority, cast Dualcaster Mage by paying its mana cost.
When Dualcaster Mage enters, it triggers, targeting Breach the Multiverse.
Holding priority, activate Woe Strider by sacrificing Dualcaster Mage.
Resolve the Dualcaster Mage trigger, copying Breach the Multiverse, with the copy targeting Dualcaster Mage
Resolve the Breach the Multiverse copy, returning Dualcaster Mage from your graveyard to the battlefield.
Repeat from step 3.
This loop lets you infinitely recur Dualcaster Mage by casting Breach the Multiverse as the spell you continuously copy, milling everyone out and taking every single creature and planeswalker from all graveyards along the way. Woe Strider acts as the crucial sacrifice outlet that puts Dualcaster Mage back into the graveyard so it can be repeatedly reanimated by the very spell it is copying. The Goat token created by Woe Strider's entry provides an immediate creature to sacrifice if needed, while Woe Strider's passive escape ability and scry triggers offer additional utility, rounding out a devastating engine that completely strips libraries and graveyards bare.