Mana Echoes + Whitemane Lion + Gemstone Array

Mana Echoes

Whitemane Lion

Gemstone Array

How it works

1. Cast Whitemane Lion by paying 1.
2. When Whitemane Lion enters the battlefield, it triggers itself and Mana Echoes.
3. Resolve the Mana Echoes trigger, adding at least CCCC.
4. Resolve Whitemane Lion's trigger, returning itself from the battlefield to your hand.
5. Activate Gemstone Array's first ability by paying 2, 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.