The Cold Ray Gun is a handheld weapon designed by European physicist Icicle. The gun is a unique weapon that can instantly freeze molecules of moisture in the air, transforming it into a sheen of ice. The Cold Gun could also freeze living tissue by solidifying the moisture inside of a person's body. The effect was often instantaneous, and flash-frozen specimens were commonly placed into a state of suspended animation. When Doctor Mahkent first adopted the guise of the Icicle, he used his cold gun to kill a gangster named Lanky Leeds. The permafrost that collected around Leeds' face disguised his features, making him resemble Mahkent. In 1947, Green Lantern (Alan Scott) investigated a mysteriously frozen ocean liner that floated into Gotham Habor. He found Leeds' frozen corpse, but mistakenly believed that it was Doctor Mahkent. Green Lantern soon learned the truth however when he unmasked the Icicle and discovered that his foe was actually Mahkent himself.
Joar due to years of prolonged exposure to the gun it mutated his genetics, which he then passed on to his son. Cameron Mahkent, alias Icicle, Jr. was born a Metahuman with cryokinetic powers as he could to lower the temperature and produce jets of ice from his hands to freeze people. The mutation altered his skin making him appear albino when his powers are not activated. 
- The Icicle's Cold Gun functions similarly to that of Captain Cold's Cold Gun.
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