Eldritch Gloop

This viscous, iridescent slime is a remnant of Fhgfg's unsettling form. When applied to a weapon, it grants an additional 1d4 psychic damage on a hit. However, after striking, the wielder must succeed on a DC 12 Constitution saving throw or be subjected to hallucinations for 1 minute, causing them to have disadvantage on attack rolls as they see bizarre visions. Additionally, the gloop has a stench that lingers, charming nearby aberrations (it can only affect them once per day) who may be inclined to approach the user cautiously. If used by non-aberrations, it may occasionally attract other aberrations, who are drawn to the scent and color of the gloop, leading to unpredictable encounters.