Thor (1966) #216 opens the door to a distinct corner of Marvel history rather than feeling like a catalogue entry that should be admired from a distance. The issue was published on 1 October 1973 as part of Thor, with Balder providing the clearest point of entry. Its premise connects the supporting cast with questions of identity and responsibility. That combination gives the opening a purpose beyond simply announcing another adventure. The plot is strongest when Thor (1966