Underworld Breach + Malevolent Rumble + Temur Ascendancy + A Realm Reborn

Underworld Breach

Malevolent Rumble

Temur Ascendancy

A Realm Reborn

How it works

1. Cast Malevolent Rumble for its escape cost by paying 1 and exiling three other cards from your graveyard, causing you to mill at least three cards and create a 0/1 Eldrazi Spawn creature token.
2. Activate the Eldrazi Spawn by tapping it, adding .
3. Activate the Eldrazi Spawn by sacrificing it, adding C.
4. Repeat.

This intricate loop turns Underworld Breach into an engine for endless recursion by leveraging Malevolent Rumble's ability to feed your graveyard while generating material. Temur Ascendancy ensures your creatures enter with haste, while A Realm Reborn grants every permanent you control the ability to tap for mana of any color, helping filter the resources needed to keep the escape chain going. By constantly recasting Malevolent Rumble from the graveyard, you sacrifice the Eldrazi Spawn tokens it creates for mana, driving an explosive loop that floods the board and mills your entire library.