River Song, Cybernetic Specialist, and Notorious Throng

Prerequisites

• River Song on the battlefield
• Cybernetic Specialist on the battlefield
• Notorious Throng in hand
• each turn available

Steps

1. Deal combat damage to an opponent using a Rogue
2. Cast Notorious Throng by paying its prowl cost, causing you to take an extra turn after this one
3. Activate Cybernetic Specialist by paying and tapping it, causing you to put Notorious Throng on the bottom of your library from your graveyard
4. Move to your next turn, drawing Notorious Throng from the bottom of your library due to River Song during your draw step
5. Repeat

Results

• Infinite turns
• Lock
• Skip your draw steps