Timestream Navigator + Cellar Door + Celestine, the Living Saint

Prerequisites

• Timestream Navigator and Celestine do not have summoning sickness.
• Opponents cannot block and kill Celestine.
• You have the city's blessing.

Steps

1. 1Activate Timestream Navigator by paying , tapping it, and putting it on the bottom of your library, causing you to take an extra turn after this one.
2. 2Activate Cellar Door by paying and tapping it, targeting yourself, putting Timestream Navigator from the bottom of your library into your graveyard and creating a 2/2 Zombie token.
3. 3Declare Celestine as an attacker, dealing 3 damage and gaining 3 life when she does combat damage.
4. 4At the beginning of your end step, Celestine triggers, returning Timestream Navigator from your graveyard to the battlefield.
5. 5Move to your next turn.
6. 6Repeat.

Effects

• Infinite turns
• Lock