Defender of Doomsday

The zombie disaster is coming. Lear, an orphan who grew up in a gladiator camp, accidentally obtains the defender system and links to the defenders of all realms. "Oh no, the zombies are coming!" "Hey! Brother, do you still have the nuclear bombs over there? Here are two." "No, zombies can do magic!" "Only with magic can you defeat magic. Hey! Brother, I've reserved two scrolls of forbidden magic from your plane!" ... The collision of swords and guns, the resonance of technology and superpowers hide a huge conspiracy! Let's see if Lear can find out the mastermind behind this and completely eliminate this dimensional disaster!