Timestream Navigator + Progenitor Mimic

Prerequisites

• You have the city's blessing.
• Timestream Navigator does not have summoning sickness.

Steps

1. 1At the beginning of your upkeep, Progenitor Mimic triggers, creating a copy of Timestream Navigator.
2. 2Activate 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. 3Repeat each turn.

Effects

• Infinite turns
• Lock