Retrofitter Foundry + Mana Echoes

Retrofitter Foundry

Mana Echoes

How it works

1. Activate Retrofitter Foundry's second ability by paying 2 and tapping it, creating a 1/1 Servo artifact creature token.
2. When the Servo enters the battlefield, Mana Echoes triggers.
3. If you control less than three Servos, activate Retrofitter Foundry's first ability by paying 3, untapping it.
4. If you control less than three Servos, repeat from step 1 until you control three Servos.
5. Resolve all Mana Echoes triggers, adding C for each Servo you control for each trigger.
6. Activate Retrofitter Foundry's first ability by paying 3, untapping it.
7. Activate Retrofitter Foundry's second ability by paying 2 and tapping it, creating a 1/1 Servo artifact creature token.
8. When the Servo enters the battlefield, Mana Echoes triggers, adding C for each Servo you control.
9. Repeat from step 6.
10. Once you have infinite mana, you may use Retrofitter Foundry's other abilities.