Whitemane Lion, Mana Echoes, and Farrelite Priest

Prerequisites

• Whitemane Lion in hand
• Mana Echoes on the battlefield
• Farrelite Priest on the battlefield
• available

Steps

1. Cast Whitemane Lion by paying
2. When Whitemane Lion enters the battlefield, it and Mana Echoes trigger
3. Resolve the Mana Echoes trigger, adding for each Cat you control
4. Resolve the Whitemane Lion trigger, returning it to your hand from the battlefield
5. Activate Farrelite Priest by paying , adding
6. Repeat
7. If you control at least two Cats outside of Whitemane Lion, this combo nets infinite mana

Results

• Infinite colorless mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite storm count
• Infinite white mana