Timestream Navigator + Planar Bridge

Timestream Navigator

Planar Bridge

How it works

1. Activate Timestream Navigator by paying 2, tapping it and putting it on the bottom of your library from the battlefield, causing you to take an extra turn after this one.
2. Activate Planar Bridge by paying 8 and tapping it, causing you to search your library for Timestream Navigator and put it onto the battlefield.
3. Repeat each turn.

This elegant loop grants you infinite turns by continuously recycling Timestream Navigator back to your library and pulling it right back out. Once you've achieved the city's blessing, you simply tap Timestream Navigator to take an extra turn, placing it neatly on the bottom of your library in the process. On that extra turn, you unleash Planar Bridge to tutor Timestream Navigator straight back onto the battlefield, ready to repeat the cycle indefinitely.