River Song + Ardent Dustspeaker + Time Warp

River Song

Ardent Dustspeaker

Time Warp

How it works

1. Cast Time Warp by paying 3, causing you to take an extra turn after this one.
2. Move to your combat phase, and declare Ardent Dustspeaker as an attacker.
3. Ardent Dustspeaker triggers, causing you to put Time Warp on the bottom of your library from your graveyard, then exile the top two cards of your library with the ability to play them this turn.
4. Move to your next turn, drawing Time Warp from the bottom of your library due to River Song during your draw step.
5. Repeat.

This clever loop gives you near-infinite turns by exploiting River Song, whose unique text makes you draw cards from the bottom of your library rather than the top. When you cast Time Warp, it resolves and heads to the graveyard, ready for Ardent Dustspeaker to scoop it back up and tuck it onto the very bottom of your library whenever it attacks. Because River Song redirects your draws to the bottom of the deck, your standard draw step naturally scoops up Time Warp right in time to cast it again for the next extra turn.