River Song, Conjurer's Bauble, Emry, Lurker of the Loch, and Time Stretch

Prerequisites

• River Song on the battlefield
• Conjurer's Bauble on the battlefield or in the graveyard
• Emry, Lurker of the Loch on the battlefield
• Time Stretch in hand
• each other turn available

Steps

1. If Conjurer's Bauble is in your graveyard, activate Emry by tapping it, targeting Conjurer's Bauble
2. Then, cast Conjurer's Bauble from your graveyard by paying
3. Cast Time Stretch by paying , causing you to take two extra turns after this one
4. Activate Conjurer's Bauble by tapping and sacrificing it, putting Time Stretch onto the bottom of your library from your graveyard, and then causing you to draw Time Stretch from the bottom of your library due to River Song
5. Repeat each other turn

Results

• Infinite turns