Grinning Ignus + Stonework Packbeast + Training Grounds + Urza's Incubator

Mana needed: {R}

UR identity

Commander legal

The 4 combo pieces

What must be in place

Urza's Incubator chose Elemental on ETB.

How to execute it

  1. Pay {R} to return Grinning Ignus to your hand, adding {R}{C}{C}.
  2. Cast Grinning Ignus for {R}.
  3. Activate Stonework Packbeast for {C} to add {R} leaving you where you started with with an additional {1}.
  4. Repeat for infinite mana.

What the combo produces