Grenzo, Dungeon Warden + Soldevi Digger + Su-Chi Cave Guard + Phyrexian Altar

Grenzo, Dungeon Warden

Soldevi Digger

Su-Chi Cave Guard

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing Su-Chi Cave Guard, adding one mana of any color.
2. When Su-Chi Cave Guard dies, it triggers, adding eight C.
3. Activate Soldevi Digger by paying 2, putting Su-Chi Cave Guard on the bottom of your library from your graveyard.
4. Activate Grenzo by paying 2, putting Su-Chi Cave Guard into your graveyard from the bottom of your library, and then putting it onto the battlefield.
5. Repeat.

This clever loop turns the massive mana injection of Su-Chi Cave Guard into an endless engine of sacrifice and resurrection. By feeding Su-Chi Cave Guard to Phyrexian Altar, you generate the colored mana needed to fund Soldevi Digger's recycling ability while simultaneously triggering Su-Chi Cave Guard's death ability for a massive influx of colorless mana. With your graveyard stocked, Grenzo, Dungeon Warden can then use his activated ability to pull Su-Chi Cave Guard right back onto the battlefield, ready to be sacrificed all over again.