When the world is in danger from mystical forces beyond anything anypony has ever seen, only one pony can stop them. Princess Celestia is the Sorceress Supreme.
A human cosplays as Deadpool, gains his powers, and finds his way to Equestria... only for the real Deadpool to find out, discover that's completely stupid, and decide to kill him.
Loki Odinson of Asgard has fallen from grace, only to find himself in an unknown realm. Reaching out to him is Princess Luna, whom he shares many similarities with. Will Loki take her help and get better, or will he spurn it because of his arrogance?