Guile + Nether Void

UB identity

Commander legal

The 2 combo pieces

What must be in place

You have any spell in hand with the mana to cast it.

How to execute it

  1. Cast any spell.
  2. Nether Void triggers, choose not to pay for the trigger, exiling the spell and casting it from exile without paying its mana cost.
  3. Repeat from step 2.

What the combo produces