Corrupt vesta's spear is part of Corrupt Vesta's equipment and can be obtained by killing Revenants in the Forinthry Dungeon or the Chaos Elemental.
It requires level 20 Attack and lasts only for 15 minutes of wielding. After the time is up, the spear will vanish.
Warning: Once you wield this item for longer than around 30 seconds, it will have the word (deg) added to its name and it becomes untradeable. Using this item in combat adds the (deg) to its name instantly, also rendering it untradeable.