I found a Taken/Darkness orb on a cliff in the Lost Oasis, above the path that leads back to Ashur. It says immune when I shoot it, even if I use Witherhoard. Anyone else see one of these or know anything about them? This is where I am on the map: https://i.gyazo.com/ef511b4f7baf82f5cae36945c3fbec70.jpg