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

River Song

Conjurer's Bauble

Emry, Lurker of the Loch

Time Stretch

How it works

1. If Conjurer's Bauble is in your graveyard, activate Emry by tapping it, targeting Conjurer's Bauble. Then, cast Conjurer's Bauble from your graveyard by paying 1.
2. Cast Time Stretch by paying 8, causing you to take two extra turns after this one.
3. 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.
4. Repeat each other turn.