You have the city's blessing and/or control at least eight permanents.
"Human", "Pirate", or "Wizard" chosen with
Reflections of Littjara.
Mana Needed
({2} magic symbol) ({U} magic symbol) ({U} magic symbol) the first turn, with ({3} magic symbol) ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) available each other turn available.
If you don't have the city's blessing and control ten or more permanents, the
Timestream Navigator token gives you the city's blessing.
Resolve the original
Timestream Navigator spell.
If you don't have the city's blessing,
Timestream Navigator gives you the city's blessing.
Activate
Riptide Laboratory's second ability by paying ({1} magic symbol) ({U} magic symbol) and tapping it, returning the nontoken
Timestream Navigator to your hand from the battlefield.
During your next turn, repeat steps 1 through 7 one additional time.
Activate the oldest
Timestream Navigator token by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) , tapping it and putting it on the bottom of your library from the battlefield, causing you to take an extra turn after this one.