Maralen of the Mornsong, Timestream Navigator, and Tannuk, Steadfast Second

Prerequisites

• Maralen of the Mornsong on the battlefield
• Timestream Navigator in the library
• Tannuk, Steadfast Second on the battlefield
• each turn available

Steps

1. At the beginning of your upkeep, Maralen triggers, causing you to lose 3 life and search your library for Timestream Navigator and put it into your hand
2. Cast Timestream Navigator by paying
3. If you don't have the city's blessing, Timestream Navigator gives you the city's blessing
4. Activate Timestream Navigator by paying , tapping and putting it on the bottom of your library, causing you to take an extra turn after this one
5. Gain at least 3 life
6. Repeat each turn

Results

• Infinite turns
• Lock