Guile, and Presence of the Master

Prerequisites

• Guile on the battlefield
• Presence of the Master on the battlefield
• You have any enchantment in hand with the mana to cast it

Steps

1. Cast any enchantment
2. Presence of the Master triggers, choose not to pay for the trigger, exiling the instant and casting it from exile without paying its mana cost
3. Repeat from step 2

Results

• Infinite storm count