Jinnie Fay, Jetmir's Second, Thorin, King of Durin's Folk, and Leyline of Transformation

Prerequisites

• Jinnie Fay, Jetmir's Second on the battlefield
• Thorin, King of Durin's Folk in hand
• Leyline of Transformation on the battlefield
• available

Steps

1. Cast Thorin by paying
2. When Thorin enters, it triggers, creating a 2/2 Cat creature token with haste due to Jinnie Fay
3. When the Cat enters as a Dwarf due to Leyline of Transformation, Thorin triggers, creating a 2/2 Cat creature token with haste due to Jinnie Fay
4. Repeat step 3

Results

• Infinite ETB
• Infinite creature tokens with haste