Underworld Breach + Malevolent Rumble + Rising of the Day + Springleaf Parade

Underworld Breach

Malevolent Rumble

Rising of the Day

Springleaf Parade

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 casting Malevolent Rumble over and over again through Underworld Breach's escape mechanic, continually fueling your mana and card pool. While the active steps rely on escaping Malevolent Rumble to churn through your library and generate an Eldrazi Spawn, the wider board state is heavily supported by Rising of the Day and Springleaf Parade. Rising of the Day ensures your creatures have haste immediately as they enter, while Springleaf Parade turns your newly created tokens into mana sources that help pay for the repeated escape costs alongside the mana produced by sacrificing the Eldrazi Spawn.