Fusion

The Fusion is a fictional wonder weapon featured in It Followed Me Home... by  Jerry Wiffle  Waffle .

Overview
The Fusion is available only from the Mystery Box. It is essentially a grenade launcher, but its shots don't drop and has no splash damage. The shots not only explode and kill zombies within a close radius, but also somewhat freezes zombies at a larger radius (that aren't affected by the explosion) and makes them slower. The shots are similar to that of an atom (with the neutrons and protons revolving around it rapidly) that is pure white.

Pack-a-Punched Variant
The Pack-a-Punched Fusion becomes the "Fury," gaining more ammo, larger radii, longer lasting effects, and more powerful explosions. Now, the sparks revolving around the shots resemble lightning bolts and are gold. The zombies that are hurt, but are not affected by the explosion will not only be slowed down, but will be electricuted (which in turn will most likely kill them anyways).