X-Men #4. A decade later, in
Giant-Size Avengers #1 by Roy Thomas and Rich Buckler, the story expands with a flashback. Introduced by the Golden Age hero the Whizzer, this Mount Wundagore myth leads to a confession. The speedster Robert Frank claims to be Wanda’s long-lost father. This story is also where we first meet Bova as the midwife to Wanda and Pietro’s mother.
Bova becomes the storyteller five years later in
Avengers #186, telling Pietro of her own origin. She was a cow evolved to human form by super-geneticist the High Evolutionary in his Wundagore lab. Bova then contradicted the Whizzer’s tale, informing Pietro that his mother was a distraught wanderer named Magda.