River Song + Ardent Dustspeaker + Temporal Manipulation

River Song

Ardent Dustspeaker

Temporal Manipulation

How it works

1. Cast Temporal Manipulation 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 Temporal Manipulation 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 Temporal Manipulation from the bottom of your library due to River Song during your draw step.
5. Repeat.

This loop achieves a mesmerizing lock on infinite turns by continuously cycling your extra-turn spell right back into your hand. While standard draw steps would normally dig from the top, River Song's unique replacement effect rewrites the rules so that you draw from the bottom of your library instead. This allows Ardent Dustspeaker to cleanly tuck Temporal Manipulation back into that exact bottom position during combat, ensuring it ends up right in your hand as your next turn begins.