You must fin the golden fleece to claim the throne.
We are off for Colchis in search for the Fleece!
Give me the fleece
You must defeat warriors that will rise from the ground
I can help, if you marry me
Once they started ruling the Iolkos ran them out. They went to Corinth where Jason was offered the kings daughter, he said yes breaking him promise to his current wife. After that she went crazy. Killing Jason's kids.
When Jason was older he was hit in the head by a killing him
