Heck Blaster

 is a gun that rapidly fires invisible bullets. Jammed enemies and bosses hit by the Heck Blaster will revert to normal.

Trivia

 * If the player has Sixth Chamber, it causes an unknown effect.
 * This gun is a reference to the Plasma Blaster from Earthworm Jim.
 * Whoa, Nelly is a catchphrase Jim uses.
 * Planet "Heck" is a location in the game.
 * The synergy's effect refers to the Plasma Blaster's ability to slowly regain ammo if it was under 100 ammo.
 * The synergy is a reference to the final boss in Earthworm Jim, The Evil Queen Pulsating, Bloated, Festering, Sweaty, Pus-filled, Malformed, Slug-for-a-Butt.
 * The synergy is a reference to the song of the same name by the band They Might Be Giants.