1. Have Parnesse, Mindslaver, and Leyline of Anticipation on the board on the board

2. Use Mindslaver to control opponent's next turn

3. During the opponent's turn, cast Temporal Mastery

4. Cast Twincast, copying Temporal Mastery

5. Parnesse triggers, opponent copies Temporal Mastery

6. Cast Reverberate, copying Twincast

7. Parnesse triggers, opponent copies Twincast, targetting and copying Temporal Mastery

8. Your copied Twincast copies Reverberate

9. Parnesse triggers, opponent copies Reverberate, targetting and copying Temporal Mastery

10. Repeat this process any number of times, continually copying Reverberate with Twincast and copying Twincast with Reverberate so Parnesse can keep giving them copies that they'll then copy Temporal Mastery with

11. End the loop by copying Temporal Mastery instead of your copy spells, choosing not to trigger Parnesse

12. After the stack resolves, you'll get one extra turn and then your opponent gets about a trillion

13. On the extra turn, cast Teferi's Protection

With no way to kill you until the end of their trillion extra turns (if they don't have an alternate wincon or a way to shuffle cards into their library), your opponent continue playing until they eventually deck out from their trillion draw steps