River Song, Reito Sentinel, and Time Walk

Prerequisites

• River Song on the battlefield
• Reito Sentinel on the battlefield
• Time Walk in hand
• each turn available

Steps

1. Cast Time Walk by paying its mana cost, causing you to take an extra turn after this one
2. Activate Reito Sentinel by paying , causing you to put Time Walk on the bottom of your library from your graveyard
3. Move to your next turn, drawing Time Walk from the bottom of your library due to River Song during your draw step
4. Repeat

Results

• Infinite turns
• Lock
• Skip your draw steps