 Jon traveled the known world in search of an opponent powerful enough to slay him, only to find that Odin had granted him invulnerability to all sorts of conventional weaponry.Desperate that he will never meet his lover again, Jon sailed away alone on his ship and was lost to the world forever.In the 20th Century, Grodd and his Legion of Doom discovered that Jon's ship still houses his corpse and is frozen within an iceberg in the Antarctic.