In the Illiad it is Apollo who guides Paris’s arrow to Achilles heel.From Atlantis01: His mother and the rest of the Gods, including Charon, the ferryman on the river styxFrom Tejones: Achilles is not killed in the Iliad. His death takes place at the end of the Aethiopis. The significance of the “weak spot” is arguable, and the origin of the story appears to be late. Homer knows nothing about it. Moreover, since Achilles was a mortal fated to be killed by the archer god, the entry point of the arrow is, at least, a secondary issue.