The Golden Throne | Final Fortune | Isochron Scepter

(and one other card)

Activate
Isochron Scepter by paying ({2} magic symbol) and tapping it, casting a copy of
Final Fortune, causing you to take an extra turn after this one and to lose the game at the end of that turn.
Activate
Prototype Portal by paying ({4} magic symbol) and tapping it, creating a token copy of
The Golden Throne.
Move to your next turn.
Activate
Isochron Scepter by paying ({2} magic symbol) and tapping it, casting a copy of
Final Fortune, causing you to take an extra turn after this one and to lose the game at the end of that turn.
At the beginning of your end step, the delayed ability of one of the
Final Fortune copies triggers, exiling the token
The Golden Throne and setting your life total to 1.
Repeat from step 2.