Thor (1962 1st Series Previously Journey Into Mystery) #432

During battle, Loki is killed by Thor and Thor is banished for eternity; Eric Masterson becomes a new Thor, a Thor that retains Eric's personality when they change.

Reprint of Journey Into Mystery 83 (Thor origin and first appearance). A lame doctor vacationing in Norway runs across an alien invasion; While hiding from the aliens in a cave he finds an old cane that transforms him into the god Thor; Thor drives back the alien invasion.