Mana Echoes + Shrieking Drake + Gemstone Array

Mana Echoes

Shrieking Drake

Gemstone Array

How it works

1. Cast Shrieking Drake by paying .
2. When Shrieking Drake enters the battlefield, it triggers itself and Mana Echoes.
3. Resolve the Mana Echoes ability, adding at least CCC.
4. Resolve Shrieking Drake's ability, returning it 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.