Ice Spear Blaster
The Ice Spear Blaster is a spear gun which fires spears made from ice. The ice is made from frozen ammonia, methane, and chlorine, all of which freeze at lower temperatures. A new spear is formed every 0.25 seconds, so the weapon is rapid-fire. At the tip of each spear there is a tiny self guiding computer with a laser guide. The weapon also includes a climbing hook.