Doc Aurlock, Grizzled Genius + Marang River Prowler + Phyrexian Altar

GU identity

Commander legal

The 3 combo pieces

How to execute it

  1. Activate Phyrexian Altar by sacrificing Marang River Prowler, adding {U}.
  2. Cast Marang River Prowler from your graveyard by paying {U}.
  3. Repeat.

What the combo produces