MarkB
Legend
I mean, it was a thing with tentacles. That's all we know.I got that too. But...
She followed some incomprehensible being of limitless malevolence into its dimension where time and space mean nothing. In those scenarios, there is no happy ending for the hero. Even if they save the world, it comes at the cost of their sanity. When the captain of the Alert stopped Cthulhu, he wound up insane afterward.
I'm sorry but there isn't enough superserum in the multiverse to keep someone from going insane after tangling with one of the many unfathomable horrors that lurk outside of the bounds of our reality in timeless undeath, waiting for the time when the stars are right again and rents in the fabric of our delicate exist tear open, freeing them from their prison beyond the stars.
I'm sure the Red Skull was going for "timeless unfathomable being from beyond the universe", but there's no guarantee that's what he actually dialled.