Augments Aura of Dread Fury incantation by increasing the chance of inflicting unholy damage. The Dark Templar will also convert a fraction of magical damage inflicted into healing while using this incantation.
Each of the first four points improves the proc rate by 1 per minute. With 5 points, the proc rate of Aura of Dread Fury is 12 procs per minute.
Each point adds 0.5% Magical Health Tap to the Aura. This health tap only applies to the Dark Templar, not the rest of the group.