Tawnos, Urza's Apprentice + Isochron Scepter + Stifle + Final Fortune

Tawnos, Urza's Apprentice

Isochron Scepter

Stifle

Final Fortune

How it works

1. Cast Isochron Scepter by paying 2.
2. Isochron Scepter enters the battlefield, triggering its imprint ability.
3. Holding priority, activate Tawnos by paying and tapping it, copying Isochron Scepter's trigger.
4. Resolve both Isochron Scepter triggers, exiling Stifle and Final Fortune from your hand.
5. Activate Isochron Scepter by paying 2 and tapping it, casting a copy of Final Fortune without paying its mana cost.
6. Resolve Final Fortune, causing you to take an extra turn after this one.
7. Move to your next turn.
8. At the beginning of the end step during your extra turn, Final Fortune triggers.
9. Holding prioirty, activate Isochron Scepter by paying 2 and tapping it, casting a copy of Stifle and Final Fortune without paying their mana cost.
10. Resolve Stifle, countering Final Fortune's trigger from step 8.
11. Repeat from step 6.