Underworld Breach + Diligent Excavator + Thassa's Oracle + Stunt Double

Underworld Breach

Diligent Excavator

Thassa's Oracle

Stunt Double

How it works

1. Cast the artifact creature from your hand by paying 0.
2. Diligent Excavator and Stunt Double trigger, causing you to mill four cards.
3. The artifact creature enters the battlefield and dies as a state-based action due to having zero toughness.
4. Cast the artifact creature from your graveyard for its escape cost by paying 0 and exiling any three cards from your graveyard, except Thassa's Oracle if it is in your graveyard.
5. Repeat from step 2 until you have an empty library.
6. If Thassa's Oracle is in your hand, cast it by paying .
7. Otherwise, cast Thassa's Oracle from your graveyard for its escape cost by paying and exiling three cards from your graveyard.
8. Thassa's Oracle enters the battlefield, causing you to win the game.

This potent loop turns zero-mana casting into a bottomless engine by relying on Underworld Breach to grant escape to every nonland card in your graveyard. As you repeatedly cast and let your zero-toughness artifact creature perish, Diligent Excavator turns each iteration into historic spell triggers that mill your library into fuel. Stunt Double can join the fray as a copy of the Excavator to double your milling output, ensuring you churn through your deck in no time. Once your library is completely empty, you can finally cast Thassa's Oracle—either from your hand or escaped from your graveyard—allowing its enters-the-battlefield trigger to see zero cards remaining and instantly claim victory.