River Song + Conjurer's Bauble + Saheeli, the Sun's Brilliance + Walk the Aeons

Prerequisites

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Steps

1. 1Activate Saheeli by paying and tapping it, creating a token copy of Conjurer's Bauble.
2. 2Cast Walk the Aeons by paying its mana cost, causing you to take an extra turn after this one.
3. 3Activate the Conjurer's Bauble token by tapping and sacrificing it, putting Walk the Aeons onto the bottom of your library from your graveyard, and then causing you to draw Walk the Aeons from the bottom of your library due to River Song.
4. 4Repeat each turn.

Effects

• Infinite turns
• Lock