Blade of the Warrior Queen (5e Equipment)
From D&D Wiki
Weapon (greatsword), very rare (requires attunement)
There once was a powerful warrior queen with a blade gifted to her by the gods. She was unstoppable in battle, but still a benevolent and kind queen to her people. Her brother grew jealous of her and her power and decided to take it from her. He managed to convince the populace that she was unfit for the throne because she was a woman. She was stripped of her title and even her blade. When her brother took the throne, he accused her of treason and sent her off to the gallows. Before her death, she cursed her blade, declaring " "no man shall ever wield my blade, for they are the filth of the earth."
The blade of the warrior queen is a magic weapon with a +2 bonus to attack and damage rolls. Its blade is decorated with scenes of a female warrior triumphing over her enemies. When you attune to this weapon, your Strength score increases by 2 and your Constitution and Charisma scores increase by 1. This effect cannot increase your ability scores above 20.
Curse. If you are a male creature, you must make a DC 18 Wisdom saving throw when you first attune to the blade. On a success, you must repeat the saving throw after 1 hour of continued attunement. If you fail the saving throw, your body will be surrounded by an aura of bright light making you impossible to see. While surrounded by the aura, you are paralysed as your body morphs and transforms to that of the female sex. After one minute the aura fades away and you are permanently transformed into a female of your race, retaining enough of the same physical features such as height, hair color and eye color to be somewhat recognisable by those who know you. Your clothing and gear also shift to fit your new form, if necessary. The transformation can only be reversed by a Wish spell. Your DM has the final say in what happens if your sex was originally ambiguous.