Lurrus of the Dream-Den, Timestream Navigator, and Cynical Loner

Prerequisites

• Lurrus of the Dream-Den on the battlefield
• Timestream Navigator on the battlefield
• Cynical Loner on the battlefield
• Timestream Navigator does not have summoning sickness
• You have the city's blessing
• Cynical Loner does not have summoning sickness and cannot be blocked and killed by an opponent, or you have another way to tap Cynical Loner each turn
• each turn available

Steps

1. Activate Timstream Navigator by paying , tapping it and putting it from the battlefield onto the bottom of your library, causing you to take an extra turn after this one
2. Declare Cynical Loner as an attacker, or tap Cynical Loner by any other method
3. At the beginning of your second main phase, Cynical Loner triggers, causing you to search your library for Timestream Navigator and put it into your graveyard
4. Cast Timestream Navigator from your graveyard by paying
5. Repeat each turn

Results

• Infinite turns