His name was Balticos, and we will meet him in the moment when he - after 10 years of fruitless efforts - decided to collect his salary for the entire 10 years, leave Stymphalia and found a new city in a more friendly place.
King Agapenor wasn't very pleased to pay him those 5000 Drachmas, but he let him go on the condition that the new city will supply Stymphalia with wood, fleece and wheat.
As there was no chance of bribing the army off and Iolcus didn't have any defenses, city became vassal of Stymphalia and a tribute of 1000 drachmas was set.