Deseu Dilleo

The Deseu Dilleo (Korean: Death Dealer) is a Wonder Weapon that first appeared in Ginae Bal-Yeol. It is an extremely powerful beam-based weapon.

Effectiveness
The Deseu Dilleo is the most powerful weapon in Zombies, as it instantly kills any zombies during any round. There is also no recoil or reloading. However, the ammo count drops by 1 every 50 milliseconds, which equates to just 5 seconds of usage.

Pagoe Bim
When Pack-a-Punched it becomes the Pagoe Bim (Korean: Destruction Beam). As the only downside of the weapon, it's only upgrade is to the ammo count, which rises to 200. This equates to 10 seconds of usage.

Haendeuheldeu Mugsilog
When Super Punched it becomes the Haendeuheldeu Mugsilog (Korean: Handheld Apocalypse). Much like it's predecessor, the only upgrade it gets is for ammo, which raises to 400. This equates to 20 seconds of usage.

Trivia

 * The image of the Deseu Dilleo is the DMR from Halo, albeit a concept art of it.