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

Tawnos, Urza's Apprentice

Isochron Scepter

Trickbind

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 Trickbind 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 Trickbind and Final Fortune without paying their mana cost.
10. Resolve Trickbind, countering Final Fortune's trigger from step 8.
11. Repeat from step 6.