Timestream Navigator + Progenitor Mimic

前提条件

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

手順

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 {2}{U}{U}, tapping it, and putting it on the bottom of your library, taking an extra turn after this one.
3. Repeat each turn.