Prerequisites
- Retrofitter Foundry on the battlefield
- Mana Echoes on the battlefield
plus up to 
additional depending on the number of Servos you control available
Steps
- Activate Retrofitter Foundry's second ability by paying and tapping it, creating a 1/1 Servo artifact creature token
- When the Servo enters the battlefield, Mana Echoes triggers
- If you control less than three Servos, activate Retrofitter Foundry's first ability by paying
, untapping it - If you control less than three Servos, repeat from step 1 until you control three Servos
- Resolve all Mana Echoes triggers, adding
for each Servo you control for each trigger - Activate Retrofitter Foundry's first ability by paying , untapping it
- Activate Retrofitter Foundry's second ability by paying and tapping it, creating a 1/1 Servo artifact creature token
- When the Servo enters the battlefield, Mana Echoes triggers, adding for each Servo you control
- Repeat from step 6
- Once you have infinite mana, you may use Retrofitter Foundry's other abilities
Results
Required Cards 2
Retrofitter Foundry
Artifact
