During the end step prior to your turn, activate Jalira by paying {2}{U}, tapping it and sacrificing another creature, revealing Timestream Navigator from your library and putting it onto the battlefield.
If you don't have the city's blessing, Timestream Navigator gives you the city's blessing.
During your turn, create at least one creature token.
Activate Timestream Navigator by paying {2}{U}{U}, tapping it and putting it from the battlefield onto the bottom of your library, causing you to take an extra turn after this one.
Activate Jalira by paying {2}{U}, tapping it and sacrificing another creature, revealing Timestream Navigator from your library and putting it onto the battlefield.
Repeat from step 3 each turn.

Infinite turns

Card that Creates One or More Creature Tokens Per Turn

Jalira, Master Polymorphist

Timestream Navigator

During your draw step, The Locust God triggers, creating a 1/1 Insect creature token with flying and haste.
Activate Timestream Navigator by paying {2}{U}{U}, tapping it and putting it on the bottom of your library, causing you to take an extra turn after this one.
Activate Jalira by paying {2}{U}, tapping it and sacrificing the Insect, causing you to reveal Timestream Navigator and put it onto the battlefield.
Repeat each turn.

The Locust God

During your draw step, Nadir Kraken triggers, causing you to pay {1} to put a +1/+1 counter on it and creating a 1/1 Tentacle creature token.
Activate Timestream Navigator by paying {2}{U}{U}, tapping it and putting it on the bottom of your library, causing you to take an extra turn after this one.
Activate Jalira by paying {2}{U}, tapping it and sacrificing the Tentacle, causing you to reveal Timestream Navigator and put it onto the battlefield.
Repeat each turn.

Combos with "Jalira, Master Polymorphist"