River Song, Cybernetic Specialist, and Walk the Aeons

Prerequisites

• River Song on the battlefield
• Cybernetic Specialist on the battlefield
• Walk the Aeons in hand
• each turn available

Steps

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

Results

• Infinite turns
• Lock
• Skip your draw steps