Grim Monolith + Prismatic Geoscope + Trazyn the Infinite

B identity

Commander legal

The 3 combo pieces

What must be in place

You control a land of each basic land type.

How to execute it

  1. Activate Trazyn using Prismatic Geoscope's ability by tapping it, adding five mana of any color.
  2. Activate Trazyn using Grim Monolith's ability by paying {4}, untapping Trazyn.
  3. Repeat.

What the combo produces