Requires

Mana Echoes must be on the battlefield. Whitemane Lion must be in hand. Gemstone Array must be on the battlefield. You control at least three Cat creatures. Mana needed:

Steps

1. Cast Whitemane Lion by paying .
2. When Whitemane Lion enters the battlefield, it triggers itself and Mana Echoes.
3. Resolve the Mana Echoes trigger, adding at least .
4. Resolve Whitemane Lion's trigger, returning itself from the battlefield to your hand.
5. Activate Gemstone Array's first ability by paying , putting a charge counter on it.
6. Activate Gemstone Array's second ability by removing a charge counter from it, adding .
7. Repeat any number of times.
8. Once you have infinite colorless mana, you may activate Gemstone Array's abilities any number of times.

Results