Zethi triggers, copying all cards you own in exile with kick counters on them and allowing you to cast the copies.
Cast the Final Fortune copy by paying ({R} magic symbol) ({R} magic symbol) , causing you to take an extra turn after this one and lose the game at the end of the extra turn.
At the beginning of each extra turn's end step, Final Fortune triggers.
Holding priority, activate Sundial of the Infinite by paying ({1} magic symbol) and tapping it, causing you to end your turn and exile Final Fortune's trigger from the stack.