The weapon is a mythical artifact forged from the essence of the cosmos, harnessing the ability to command dark matter and conjure small-scale black holes. This extraordinary creation, a blend of advanced technology and arcane sorcery, features a sleek, darkened blade that seems to swallow light, its surface etched with glowing, violet veins pulsing from its core. The hilt is richly engraved with intricate celestial patterns, reminiscent of swirling nebulae, and houses a suspended core of dark energy that emits a subtle, unnerving gravitational pull. Upon activation, the weapon warps the very fabric of space, sending ripples through reality that alter time and space. With each stroke, it can open diminutive black holes, devouring everything in its trajectory. A paragon of annihilation and cosmic supremacy, this weapon is dreaded by deities and mortals alike.