Dark Ritual + Eternal Witness + Grenzo, Dungeon Warden + and 2 others

Mana needed: {B}

BRG 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 Eternal Witness, adding one mana of any color.
  3. When Eternal Witness dies, The Cauldron of Eternity triggers, putting Eternal Witness from your graveyard onto the bottom of your library.
  4. Activate Grenzo by paying {2}, putting Eternal Witness from the bottom of your library into your graveyard, and then putting it onto the battlefield.
  5. When Eternal Witness 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