Champion tier magic weapon (+2 to att and dmg rolls.) This and other magic items I've created are collected together in the attached PDF.
Necromancer's Sword of Embalming: While this blade appears as though it's in a constant state of rusting away, it's actually very strong. The metal is infused with necromantic energy, making it resistant to almost all forms of decay, and energy it passes on to the person using it. While in possession of this sword, the owner is immune to any ongoing effects and statuses caused by undead enemies.
Quirk: Self Preservation. Regardless of your inclinations before owning this sword, you are now hesitant to be the first to risk your life or safety during adventures.