Tawnos, Urza's Apprentice | Isochron Scepter | Stifle

(and one other card)

Tawnos on the battlefield.
All other permanents in hand.
({4} magic symbol) ({U} magic symbol) ({R} magic symbol) on your first turn, with ({2} magic symbol) available on each extra turn available.

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