How can you create a combo with Guile, Cephalid Shrine?
user
[START OF COMBO]This combo can be formed with Guile, Cephalid Shrine

Color identity: U
Mana cost: 
Steps:
  1. Cast any spell.
  2. Cephalid Shrine 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.[END OF COMBO STEPS]

Result:
  - Infinite magecraft triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have any spell in hand with the mana to cast it.
[END OF COMBO PREREQUISITES]
assistant