Apparently, I'm Dead

No one thought that Perseus Jackson and Annabeth Chase would die on his way to a date during a vacation in Boston. No one thought that Percy would end up in Valhalla and Annabeth in Elysium. But when he's killed after fighting Jormungandr's favorite (and largest) child, he's introduced to a whole new pantheon. Percy and the einherjar of Floor 19 will have to foil yet another one of Loki's evil plans. Along the way, Percy discovers new powers that he struggles to control.
So now he has to stop the end of the world. Again.
While he's dead.
Gods.
Is it too much to wish for a break?

This is a Percy Jackson/Heroes of Olympus and Magnus Chase crossover. A tiny bit of Dark and OP!Percy. Written because I couldn't find any like it. Please pretend that Magnus has never heard of Percy or the Greek pantheon. Just imagine that the last time he saw Annabeth was when they were seven at Randolph's house. I know it doesn't make sense, but just play along.