If I was tanking with a DK or focusing my damage dealing capabilities around an equipment deck DK, Rune of Vengeance is a very good card. You can pay 2 to remove an ally from the game and add it's ATK to the weapon that the card is attached to. Play this on a bomb and HELLO! or you can play it small time and get some additional damage in. I like this card- and if you find yourself getting equipment out a lot with your DK- consider throwing this INSTANT ability in, which can be played during the combat step when you have priority.