Arraetrikos

Arraetrikos is the raid boss of the Shroud, is encountered in phase 4 and phase 5 of the raid.

This raid boss is often nicknamed "Harry" when discussing "Harry Beaters," weapons containing both Silver and Pure Good that will bypass his damage reduction.

Arraetrikos

 * CR: 28/33/38 on Normal/Hard/Elite
 * Lawful Evil Pit Fiend (Lawful Evil Outsider)
 * HP: Very High
 * 100,000/125,000/220,000 - part 4, normal/hard/elite
 * 150,000/unknown/330,000 - part 5, normal/hard/elite
 * AC: 39/45/51 (Normal/Hard/Elite)
 * 50% Fortification on Normal, Hard, and Elite (tested)
 * DR: 15/Silver+Good, this increases on Hard/Elite setting (Hard 25, Elite 35) (tested). This used to be higher on Hard and Elite, but was reduced.
 * Immunity to fire, poison and Symbol of Weakness
 * Resistance to acid and cold 30 (Normal), roughly ~50 point on Elite
 * No resistance to electricity and sonic (confirmed)
 * Evasion (Hard/Elite only)
 * SR 36/38/42 depending on difficulty

Melee

 * Average melee damage: 47.6/??/65.4 on Normal/Hard/Elite (tested)
 * Double-strikes occasionally on Normal, and almost all of the time on Elite (two attacks in one swing animation)
 * Pit Fiends' melee attacks also have poison and disease effect as following:
 * Posion Injury: Fortitude DC 32, initially 1d6 Con damage, secondary 1000 Con damage.
 * Devil Chills disease: Fortitude DC 32, 1d6 Str damage.
 * True Seeing

Spells Known

 * Delayed Blast Fireball: 200-300 fire damage on Normal/Hard/Elite (average 250, save DC 30/32/34)
 * Meteor Swarm: 4x 60-90 fire damage (save DC 32/34/36), 4x 20-30 bludgeon damage (no save, unaffected by DR)
 * Mass Hold Monster: DC unknown, suspected to be 32/34/36
 * Teleport: teleports random player into his melee range (only on phase 5) DC ~28 Normal