Underworld Breach + Malevolent Rumble + Cryptolith Rite + Gimli's Reckless Might

Underworld Breach

Malevolent Rumble

Cryptolith Rite

Gimli's Reckless Might

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 loop turns your graveyard into an engine by giving every card escape through Underworld Breach, allowing you to repeatedly cast Malevolent Rumble to churn through your library and generate Eldrazi Spawn tokens. Those tokens are immediately put to work thanks to Cryptolith Rite, which turns them into mana sources so you can pay for the escape costs over and over again without letting the chain fizzle. Meanwhile, Gimli's Reckless Might grants your creatures haste, ensuring that any hasty threats you uncover along the way can immediately join the fray.