Alondite

This legendary obsidian and ivory blade was once the longsword of Lord General Zelgius of the Umbral Luminosity. When he fell in the battle of the calamity of divinity, this blade was thought to be lost. Now reawakened, this blade hungers for battle once more, to be known worldwide as the most legendary weapon to ever exist.

Callous Strike

Once per turn, deal a deadly strike that target's a foes core internals and ruptures them. Deal an additional 2d6 necrotic damage.

Edge of Night

Deal an attack so devastating, that it shatters the mind-state of a foe and renders it weakened and withered. The target must succeed on a constitution saving throw (DC 18) or become stunned until the end of your next turn. In addition to this, the target must also succeed on a wisdom saving throw (DC 18) or become frightened for 1 minute, the target can repeat the save at the end of its turns, ending the effect on a success. 

Ominous Culling

An attack that is so powerful, it ruptures the very reality of the material plane. Deal an additional 4d8 force damage and an additional 4d8 psychic damage. This feature cannot be used again until after a long rest.

Calamitous Fissure

Striking the ground with a destructive blow causes a pryoclastic fissure to erupt forth. Calling forth the blade's power, you can strike the ground and summon a fissure to erupt forth starting from the blade's point of impact. This stretches forward for 120ft long, 60ft deep and 10ft wide. Any creatures within the fissure suffer 2d6 fire damage at the start of their turns whilst in the fissure. This feature cannot be used again until a week has passed.

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Damage: Force, Damage: Psychic, Versatile, Sap