Appa, Steadfast Guardian, Aang, Swift Savior // Aang and La, Ocean's Fury, and Heliod, the Radiant Dawn // Heliod, the Warped Eclipse

Prerequisites

• Appa, Steadfast Guardian in hand
• Aang, Swift Savior // Aang and La, Ocean's Fury in hand
• Heliod, the Radiant Dawn // Heliod, the Warped Eclipse on the battlefield
• available

Steps

1. Cast Appa by paying
2. When Appa enters, it triggers, airbending Aang
3. Cast Aang from exile by paying
4. Appa triggers, creating a 1/1 Ally creature token
5. When Aang enters, it triggers, airbending Appa
6. Cast Appa from exile by paying
7. Repeat from step 2

Results

• Infinite ETB
• Infinite LTB
• Infinite creature tokens
• Infinite storm count