Grenzo, Dungeon Warden + The Cauldron of Eternity + Phyrexian Altar + Dark Ritual + Salvager of Secrets

Grenzo, Dungeon Warden

The Cauldron of Eternity

Phyrexian Altar

Dark Ritual

Salvager of Secrets

How it works

1. Cast Dark Ritual by paying , adding .
2. Activate Phyrexian Altar by sacrificing Salvager of Secrets, adding one mana of any color.
3. When Salvager of Secrets dies, The Cauldron of Eternity triggers, putting Salvager of Secrets from your graveyard onto the bottom of your library.
4. Activate Grenzo by paying 2, putting Salvager of Secrets from the bottom of your library into your graveyard, and then putting it onto the battlefield.
5. When Salvager of Secrets enters the battlefield, it triggers, returning Dark Ritual from your graveyard to your hand.
6. Repeat.
7. Once you have infinite mana, you may activate Grenzo's ability any number of times.

This intricate loop sets up an engine to endlessly recur Salvager of Secrets using Grenzo, Dungeon Warden, whose power lets it reliably cheat the wizard back onto the battlefield from the bottom of your library. As Salvager of Secrets enters, its ability snatches Dark Ritual right back from your graveyard to your hand, providing the mana needed to fuel the cycle. Meanwhile, The Cauldron of Eternity quietly ensures that every creature you sacrifice—including Salvager of Secrets itself—goes straight back to the bottom of the library rather than staying in the yard. Finally, sacrificing Salvager of Secrets to Phyrexian Altar along the way converts your recursive loops into infinite colored mana, allowing you to eventually flood the battlefield with every creature in your library via Grenzo, Dungeon Warden.