Dark Ritual + Grenzo, Dungeon Warden + Phyrexian Altar + and 2 others

Mana needed: {B}

UBR identity

Commander legal

The 5 combo pieces

What must be in place

Grenzo has power 2 or greater.

How to execute it

  1. Cast Dark Ritual by paying {B}, adding {B}{B}{B}.
  2. Activate Phyrexian Altar by sacrificing Scrivener, adding one mana of any color.
  3. When Scrivener dies, The Cauldron of Eternity triggers, putting Scrivener from your graveyard onto the bottom of your library.
  4. Activate Grenzo by paying {2}, putting Scrivener from the bottom of your library into your graveyard, and then putting it onto the battlefield.
  5. When Scrivener 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.

What the combo produces