10 Times Superheroes Defeated Themselves
4. Deadpool Fights Himself - Deadpool Kills Deadpool #4
What happens when you place two undying murder machines against one another in a no-holds-barred bout to the death? Well, you get a pretty decent comic at minimum, as Deadpool Kills Deadpool covers this exact situation, with our semi-heroic Deadpool fighting 'Dreadpool' - who may be recognisable to long-term 'Pool fans as the main character in the Deadpool Kills the Marvel Universe series.
As such, there's a whole lot of Deadpool based death in the comic, with the first issue alone containing the deaths of two Deadpools and one Dogpool just for starters.
After cutting a bloody swathe of mercenary murders, the series culminates in our universe's Deadpool taking on Dreadpool, beating his evil counterpart first in an argument, then cutting his head off and covering him in acid to completely dissolve him, making sure this is one fight that can't happen again.