Decaying Soil + Phyrexian Altar + Shield Sphere

B identity

Commander legal

The 3 combo pieces

What must be in place

You have at least seven cards in your graveyard.

How to execute it

  1. Cast Shield Sphere by paying {0}.
  2. Activate Phyrexian Altar by sacrificing Shield Sphere, adding {1}.
  3. When Shield Sphere dies, Decaying Soil triggers, causing you to pay {1} to return Shield Sphere to your hand from your graveyard.
  4. Repeat.

What the combo produces