Timestream Navigator, and Progenitor Mimic

Prerequisites

• Timestream Navigator on the battlefield
• Progenitor Mimic on the battlefield
• You have the city's blessing
• Timestream Navigator does not have summoning sickness
• each turn available

Steps

1. At the beginning of your upkeep, Progenitor Mimic triggers, creating a copy of Timestream Navigator
2. Activate the ability of any Timestream Navigator that has not entered this turn by paying , tapping it, and putting it on the bottom of your library, taking an extra turn after this one
3. Repeat each turn

Results

• Infinite turns