Spellbinder | Final Fortune | Sundial of the Infinite

Cards

Final Fortune in exile (
Final Fortune exiled by
Spellbinder).
Spellbinder and
Sundial of the Infinite on the battlefield.
Spellbinder attached to a creature that can attack this turn and that cannot be blocked by an opponent.
({1} magic symbol) EACH EXTRA TURN available.

Deal combat damage to a player with the equipped creature.
Spellbinder's second ability triggers, allowing you to cast a copy of
Final Fortune without paying its mana cost.
The
Final Fortune copy resolves, causing you to take an extra turn after this one and creating a delayed triggered ability that will cause you to lose the game at the end of that turn.
Repeat steps 1 to 3 on your next extra turn.
At the beginning of your end step, a delayed triggered ability from
Final Fortune triggers.
In response, activate
Sundial of the Infinite by paying ({1} magic symbol) and tapping it, exiling that ability and ending the turn.
Repeat from step 4 each turn.