The Sword of Eternal Guard

An ancient master forged this steel gladius-like blade and enchanted it so that it could not leave the hand of its wielder so long as a single enemy remained within ten paces. And even now, the enchantment holds true: anyone who draws the sword and holds it in their hand can not be disarmed, no matter how skilled or determined their opponent. They can not be made to drop it by accident, by shock or exhaustion, sweat or grime,  or even loss of consciousness, nor can they lay it down and thus fall into a trap. The hand itself can be separated from the arm, yes, and some wielders have chosen this escape.

The Sword of Eternal Guard is considered cursed by those who know its history.

The very air swarms with invisible disease-spirits. And although these are vanishingly small, and undetected by mortal senses, and although they are easily repelled by the fortress-walls of skin that defend the body, the enchantment on the Sword still responds to them and refuses to let it be parted from the flesh of its bearer’s hand.

It is a good blade, and its magic prevents it from dulling, rusting, or breaking, no matter what is asked of it. It can be sheathed, so it is not necessarily a constant danger. But a wielder does tend to find themselves invited to fewer parties than they might have been otherwise.