The Echo of Varshan is a world boss that can be found in the Bloodtide region of Diablo 4. It is a powerful undead mage who wields a variety of spells and abilities.
Arcane Barrage: The Echo of Varshan fires a barrage of arcane energy at its target. This attack deals Arcane damage.
Shadow Bolt: The Echo of Varshan fires a bolt of shadow energy at its target. This attack deals Shadow damage.
Dark Nova: The Echo of Varshan creates a dark nova that damages enemies in its area of effect. This attack deals Shadow damage.
Wrath of the Dead: The Echo of Varshan summons a group of undead minions to fight for it. These minions deal Physical damage.
In conclusion, the Echo of Varshan deals Arcane, Shadow, and Physical damage.