With scores locked 12-12 at the end of a draining 80 minutes, a Manly mistake in the first set of golden point gave Ilias his chance and he did not disappoint.
After absorbing plenty of early pressure the Sea Eagles found space on the left side but Campbell Graham muscled up in defence to take Reuben Garrick into touch before Manly's Brad Parker returned the favour on Izaac Tu'itupou Thompson.
In the 13th minute of the match the crowd rose to their feet for a minute of applause in honour of Rabbitohs legend John Sattler, who passed away this week at the age of 80.