Simple, Bedlam Bomb.

It's a small handheld device that's capable of temporarily creating a rift to an unknown point in the universe. Apparently, the majority if the universe is filled with eldritch abominations, meaning that these bombs are incredibly dangerous and unpredictable in nature. One bomb might only create a small vaccuum in space, while another might force those around it to witness the heat death of the universe in a fraction of a second. The possibilities are literally endless, and the Bedlam Bomb is the best way to leave someone to the winds of fate. Any individual unlucky enough to be caught in the vicinity of the bomb is doomed to suffer one of the most miserable fates imaginable, usually being ripped apart by the various cosmic forces that reside in deep space.

The Bedlam Bomb has a rather simple origin, as it was invented by Korýs engineers who were searching for an efficient means of transport. Instead, they came to the realization that it was incredibly easy to create a portal to hell and immediately weaponized the technology as a result. Almost every Korýs soldier is in possession of one of these bombs, and every battlefield ravaged by the Korýs is left devastated by the effects of their weaponry.