Underworld Breach + Malevolent Rumble + Mass Hysteria + Insidious Roots

Underworld Breach

Malevolent Rumble

Mass Hysteria

Insidious Roots

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 potent loop hinges on Underworld Breach, which grants every nonland card in your graveyard escape so you can recast them endlessly by paying their mana costs and exiling fodder. You target Malevolent Rumble with this recursive engine, fueling its escape cost by feeding the cards you just milled back into exile. Meanwhile, Mass Hysteria ensures your newly generated tokens can act immediately, while Insidious Roots transforms every card leaving your graveyard into a growing army of Plant tokens that can tap for mana to help sustain the combo.