River Song + Conjurer's Bauble + Salvaging Station + Walk the Aeons

River Song

Conjurer's Bauble

Salvaging Station

Walk the Aeons

How it works

1. If Conjurer's Bauble is in your graveyard, activate Salvaging Station by tapping it, returning Conjurer's Bauble from your graveyard to the battlefield.
2. Cast Walk the Aeons by paying its mana cost, causing you to take an extra turn after this one.
3. Activate Conjurer's Bauble 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. Repeat each turn.