You may be thinking, “Deadpool? Powerful?” Yes. Here’s why: If you’ve his comic book arc, you know that Deadpool kills the Marvel Universe. The X-Men send The Merc with a Mouth to a mental facility in order to be “cured,” and he ends up being treated at the hospital by Psycho-Man. Psycho-Man’s treatment fails, leaving Deadpool to be even more unhinged that before. The antihero kills Psycho-Man before going on an all-out killing spree throughout Marvel Universe, with both heroes and villains as his victims.