I was playing through legacy story missions on my less used characters to get them over with before BL. At one point, a clanmate of mine joined and he was using the Witherhoard. I eventually got to the mission Omega, where you track Panoptes down and kill him/it/her/whatever. My clanmate shot their witherhoard at Panoptes, went in it, and its health bar started depleting and eventually died, before the "damage phase" began. When it was time to actually damage Panoptes, it was already dead, so the lingering arc effect killed us. I doubt it'll be fixed since the mission will be gone soon, but i found this bug to be very funny/amusing. I'm waiting to try the witherhoard on Panoptes in other missions he's been in,