Forerunner of the Coalition | Timestream Navigator | Brago, King Eternal

Cards

All permanents on the battlefield.
Brago does not have summoning sickness.
An opponent cannot block
Brago.
You have the city's blessing.
You have an effect that grants
Timestream Navigator haste each turn.
({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 extra turn available.

Activate
Timestream Navigator by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) , tapping and putting it on the bottom of your library, causing you to take an extra turn after this one.
Deal combat damage to an opponent with
Brago.
Brago triggers, blinking
Forerunner of the Coalition. and any number of other nonland permanents you control.
Forerunner of the Coalition enters, triggering its first ability, causing you to search your library for
Timestream Navigator and put it on top of your library.
Move to your next turn, drawing
Timestream Navigator during your draw phase.
Cast
Timestream Navigator by paying ({1} magic symbol) ({U} magic symbol) .
Timestream Navigator enters the battlefield, triggering
Forerunner of the Coalition's second ability, causing each opponent to lose 1 life.
Repeat.

This loop will only continue as long as you can deal combat damage to an opponent with
Brago.