Thor #274 [British]-Fine (5.5 – 7) Death of Balder

"The Eye - and the Arrow!" Odin, Sif and Frigga return to Asgard to discover that Loki has regained his powers; Odin reveals that Ragnarok has been foretold to begin with the death of Balder the Brave; While displaying his invulnerability to Asgardian weapons, Balder is struck down by an enchanted weapon supplied by Loki.
(NOTES: 1st appearance of Frigga, previously appeared in cameo as Fricka in Journey Into Mystery #92;
1st appearance of Hugin and Munin, Odin's ravens, also known as Thought and Memory;
Death of Balder;
1st appearance of Sleipnir (Sleipneir), Odin's horse;
1st appearance of Hermod, a god of messengers)