Mindshriek [CARD] (Patreon)

Weapon (longsword), rare (requires attunement)

Piercing Shriek. The first time each turn you damage a creature with this weapon it unleashes an otherworldly scream that deals an additional 1d8 psychic damage to the target. The target must make an intelligence saving throw. The DC is equal to 10 + your intelligence bonus. On a failed save the creature's mind is rattled by the scream and has disadvantage on attacks it makes against you until the end of its next turn. Once this ability is used, you must roll a d20. On a 1, this weapon instantly disappears into the Astral Sea. The following long rest the sword whispers to you in your dreams to help it return, and you must make a DC 15 charisma check. On a success, you awaken with the sword by your side, while on a failure you repeat this check each long rest until you succeed or unattune from the weapon.

An ideal weapon must be balanced, powerful, and above all, not annoying to use. It was in that capacity Mindshriek was so reviled amongst the army that they sought to have it gone from their ranks. A simple banishment spell seemed to solve their problem, but Mindshriek would not go quietly into the night as it began to unravel the complexities of the Astral Plane in order to return to the material realm and scream till the end of time.