Upon casting Bonestorm, the Lich King deals area damage around himself. This ability is unique because there is a quiet zone in the middle of the ability where units may avoid damage.
Damage is dealt as death damage, and applies an effect on-hit. The effect stacks up to 3 times, and slows movement speed by 10% and does 2 damage every second (per stack).
Bonestorm will really help the Undead due to the fact that previously they only had one (admittedly great) ultimate, Necrogenesis. Now, you can run both ultimates at the same time, and choose between a defensive mass-res, or an offensive AOE ability. Can’t wait to see how it does in playtesting!