Dr. Boom is OP. Yup, even in arena. I'm not going to go too deep into it, but we're not giving it its proper due in this Tier List due in part to the slight RNG, and due in part to leaving some space for potential better cards. But seriously, Blizzard. Every result ever gathered in Hearthstone with Dr. Boom is pointing in the same direction. I was never a huge fan of the card (and only used it once), and so we didn't have it top-tier rated. But, the stats for this are as ridiculous as the stats for Ancestor's Call (I've said it on stream before, but if we could, we'd give this thing a -30 tier score, max, so that nothing heartharena does could push it over a hungry crab). Oh, and speaking of Hungry Crab. It's pure statistical value is about a 44 Tier Score. We are not joking. The sample size is surprisingly decent as well. Please post your personal testing results.