My group plays with two copies of this card in our custom Spell deck. It is often pivital in someone's play for the victory as it can be used offensively (to stop another player from getting some souls) or defensively (to save yourself the potential wounds). We also like that you have to use it before the hero enters a dungeon, so you can't wait until someone wasted all their great spells trying to kill it before it is stopped. It is not too overpowered in that it is just for the turn, but I'm rarely disappointed to draw this card! At the same time, I'm never upset when someone else uses it, as it isn't that powerful (certainly no more powerful than cards like "Fear" or "Pity!").