Dovescape, and Guile

Prerequisites

• Dovescape on the battlefield
• Guile on the battlefield

Steps

1. Cast any noncreature spell from your hand by paying its mana cost
2. Dovescape triggers, exiling the spell, causing you to cast the spell without paying its mana cost, and creating a number of 1/1 Bird creature tokens equal to the spell's mana value
3. Repeat step 2

Results

• Infinite creature tokens
• Infinite ETB
• Infinite magecraft triggers
• Infinite storm count