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

Prerequisites

• Forerunner of the Coalition on the battlefield
• Timestream Navigator on the battlefield
• Brago, King Eternal 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
• the first turn, with available each extra turn available

Steps

1. Activate Timestream Navigator by paying , tapping and putting it on the bottom of your library, causing you to take an extra turn after this one
2. Deal combat damage to an opponent with Brago
3. Brago triggers, blinking Forerunner of the Coalition
4. and any number of other nonland permanents you control
5. 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
6. Move to your next turn, drawing Timestream Navigator during your draw phase
7. Cast Timestream Navigator by paying
8. Timestream Navigator enters the battlefield, triggering Forerunner of the Coalition's second ability, causing each opponent to lose 1 life
9. Repeat

Results

• Infinite turns