Board Thread:General Discussion/@comment-1515612-20140515012433/@comment-5019333-20140617165117

He sacrificed himself to kill Kronos.

When Luke was about to hurt Annabeth, she reminded him of his promise to never hurt her. This sparked inside Luke; he became observant of what was happening, and stabbed himself. The end.

What is Tyson's story before he was rescued by Percy?