Underworld Breach + Malevolent Rumble + Phabine, Boss's Confidant + A Realm Reborn

Underworld Breach

Malevolent Rumble

Phabine, Boss's Confidant

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 crafty loop centers on Underworld Breach, which grants every nonland card in your graveyard the escape keyword so you can recast them repeatedly. By casting Malevolent Rumble from your graveyard over and over, you churn through your library while feeding the very exile costs that Underworld Breach demands. To pay for this engine, A Realm Reborn steps in with a passive mana-fixing ability that turns your growing collection of permanents into a reliable color-any-mana resource. Meanwhile, Phabine, Boss's Confidant hangs back as a potential beneficiary of the creature tokens generated along the way, tying the whole graveyard-fueled operation together into an overwhelming storm of value.