For general details of the Arc skills and their shockwaves, see Arc of Deliverance.
Takes ten seconds to charge, like the lower tier skills - unleashing the skill before it is fully charged will result in a significantly less powerful strike.
Arc Of Obliteration - 7 Living Armor Warrior Solo - Warrior Skills Dragon's Dogma -DDDA-
Whilst a direct hit does some damage, the subsequent fall inflict over four bars of damage on Living Armor
Arc of Obliteration vs Griffin (demonstration)
Even with a direct head shot, Arc of Obliteration will not one-shot kill most large enemies (without buffs or periapts). In this demonstration a Goldforged Bitter End longsword, with a strength ring, maximum strength boosting armor and the Clout and Vehemence augments fail to do the job over several attempts to one-shot this Griffin.