Cephaliarch’s Flail is an Arcanist Skill, found in the Herald of the Tome skill line.
Base Skill: Abyssal Impact
|Infuse your arm with abyssal magic to form tentacles that lash out at your foes, dealing 1939 Physical Damage, healing yourself for 969 and generating Crux. Enemies are immobilized for 3 seconds and marked with Abyssal Ink for 20 seconds. Deals up to 100% more damage to enemies with less than 50% Health. You deal 5% increased damage to enemies drenched in Abyssal Ink.|
Cephaliarch’s Flail is a morph of Abyssal Impact base skill. The other morph is Tentacular Dread.