Leyline of Singularity + Ornithopter + Phyrexian Altar + Yomiji, Who Bars the Way

WU identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Phyrexian Altar by sacrificing Ornithopter, adding one mana of any color.
  2. Yomiji triggers, returning Ornithopter from your graveyard to your hand.
  3. Cast Ornithopter by paying {0}.
  4. Repeat.

What the combo produces