Cast Expropriate by paying ({7} magic symbol) ({U} magic symbol) ({U} magic symbol) , causing you to take at least one extra turn after this one and exile Expropriate.
Activate Isochron Scepter by paying ({2} magic symbol) and tapping it, casting a copy of Pull from Eternity without paying its mana cost.
Resolve Pull from Eternity, putting Expropriate into your graveyard from exile.
Move to your next turn.
Activate Dralnu by tapping it, giving Expropriate flashback until end of turn.
Cast Expropriate from your graveyard by paying ({7} magic symbol) ({U} magic symbol) ({U} magic symbol) , causing you to take an extra turn after this one and exile Expropriate.