Molten Echoes + Timestream Navigator + Thassa, Deep-Dwelling

Molten Echoes

Timestream Navigator

Thassa, Deep-Dwelling

How it works

1. At the beginning of your end step, Thassa triggers, blinking Timestream Navigator.
2. Timestream Navigator enters the battlefield, triggering Molten Echoes, creating a token copy of Timestream Navigator with haste.
3. Activate the token Timestream Navigator by paying 2, tapping it and putting it on the bottom of your library, causing you to take an extra turn after this one.
4. Repeat each turn.