Lita, Mechanical Engineer, and The Peregrine Dynamo

Prerequisites

• Lita, Mechanical Engineer on the battlefield
• The Peregrine Dynamo on the battlefield
• You control artifact creatures that can tap to add at least
• Lita is not your commander

Steps

1. At the beginning of your end step, Lita triggers
2. In response, activate artifact creatures by tapping them to add at least
3. Continuing to hold priority, activate The Peregrine Dynamo by paying and tapping it, copying Lita's triggered ability
4. Resolve the copied ability, untapping all artifact creatures you control
5. Repeat from step 2

Results

• Infinite mana artifact creatures you control can produce
• Infinite untap of artifact creatures you control