Cloudstone Curio + Edgar Markov + Phyrexian Altar

RWB identity

Commander legal

The 3 combo pieces

What must be in place

You control a nontoken, nonartifact Vampire that can be cast using one colored mana.
You have a nonartifact Vampire card in hand that can be cast using one colored mana.
You have enough mana to cast the Vampire in hand.

How to execute it

  1. Cast the nonartifact Vampire from your hand by paying its mana cost.
  2. Edgar triggers, creating a 1/1 Vampire creature token.
  3. The nontoken Vampire enters the battlefield, triggering Cloudstone Curio, returning any other nontoken, nonartifact Vampire that can be cast using one colored mana from the battlefield to your hand.
  4. Activate Phyrexian Altar by sacrificing the Vampire token, adding one mana of any color.
  5. Repeat.

What the combo produces