Whisper from beyond is a weakening spell not a finishing spell. The hanged are a fear model there also 9 stones. They have a cast stat of 6 definitely strong. but there are many ways around this ability. Condition removal, Model removal, DMG spells, weapons that ignore incoporeal. Its not overpowered, there are lots of ways to get around it, any condition removal will stop the no healing bit, and taking out the hanged takes our a 9ss minion. Its good, but most things in this game are.