Xuthus adopted a son that this god fathered with Creusa, named Ion.
In one story, a sacrifice to this deity was interrupted by Callipolis, whose father Alcathous killed him for impiety. Earlier, this god had helped Alcathous construct the walls of Megara. This god caused Clytia to wither and die after she revealed an affair between this god and Leucothea. Xuthus adopted a son that this god fathered with Creusa, named Ion. This god got the Fates drunk as a favor for Admetus, whom this god had to serve as punishment for killing the Cyclopes, which he had done as revenge for Zeus's killing of his son Asclepius. This slayer of Python founded the oracle of Delphi, killed the seven sons of Niobe, and tricked his sister into killing Orion with her bow. For 10 points, name this Greek god of light and music, the twin brother of Artemis.
In one story, a sacrifice to this deity was interrupted by Callipolis, whose father Alcathous killed him for impiety.
Apollo [or Apollon]