Cast TImestream Navigator by paying 1, plus an additional 2 for its offspring cost.
If you control ten or more permanents and don't have the city's blessing, Timestream Navigator gives you the city's blessing.
When Timestream Navigator enters the battlefield, it triggers, creating a token copy of it that is 1/1.
If you control ten or more permanents and don't have the city's blessing, the Timestream Navigator token gives you the city's blessing.
At the beginning of your combat phase, Nesting Dovehawk triggers, creating a copy of the Timestream Navigator token.
If you control ten or more permanents and don't have the city's blessing, the Timestream Navigator token gives you the city's blessing.
During your next turn, repeat steps 5 and 6. Then, activate the oldest Timestream Navigator token by paying 2, tapping it and putting it from the battlefield onto the bottom of your library, causing you to take an extra turn after this one.
Repeat step 7.
This brilliant loop relies on Zinnia, Valley's Voice to grant offspring to Timestream Navigator, turning every casting into a pair of navigators ready to secure the city's blessing once you command ten or more permanents. With your tokens established, Nesting Dovehawk steps in during each combat phase to populate fresh copies of the token navigator without needing to recast the original. By cycling these extra tokens into the library for infinite extra turns while using the dovehawk to sustain your engine, you lock down the game completely.