Cast Walk the Aeons by paying {4}{U}{U}, causing you to take an extra turn after this one.
Move to your next turn.
At the beginning of your upkeep, Anurid Scavenger triggers, causing you to put Walk the Aeons on the bottom of your library from your graveyard.
Move to your draw step, drawing Walk the Aeons from the bottom of your library due to River Song.
Repeat.

Infinite turns

Skip your draw steps

Lock

River Song

Anurid Scavenger

Walk the Aeons

Cast Capture of Jingzhou by paying {3}{U}{U}, causing you to take an extra turn after this one.
Move to your next turn.
At the beginning of your upkeep, Anurid Scavenger triggers, causing you to put Capture of Jingzhou on the bottom of your library from your graveyard.
Move to your draw step, drawing Capture of Jingzhou from the bottom of your library due to River Song.
Repeat.

Capture of Jingzhou

Cast Temporal Manipulation by paying {3}{U}{U}, causing you to take an extra turn after this one.
Move to your next turn.
At the beginning of your upkeep, Anurid Scavenger triggers, causing you to put Temporal Manipulation on the bottom of your library from your graveyard.
Move to your draw step, drawing Temporal Manipulation from the bottom of your library due to River Song.
Repeat.

Temporal Manipulation

Cast Time Warp by paying {3}{U}{U}, causing you to take an extra turn after this one.
Move to your next turn.
At the beginning of your upkeep, Anurid Scavenger triggers, causing you to put Time Warp on the bottom of your library from your graveyard.
Move to your draw step, drawing Time Warp from the bottom of your library due to River Song.
Repeat.

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