Head northeast, down and away from L'ghorek. Look for a big green runic circle. The totem is just to the south of it. Ick'thys is a level 82 faceless one, with 77,000 health and the following abilities:
[Mental Battle]ωϖ 40 yd range—Forces the target to do battle with himself. Summons a Sinister Reflection of the player with ~7000 health and representative abilities of the class. Cast once at the beginning of the fight.
[Shadow Bolt]ωϖ 40 yd range—Hurls a bolt of dark magic at an enemy, inflicting Shadow Damage.
[Void Zone]ωϖ 50,000 yd range—Summon a Void Zone that deals Shadow damage to enemies that stand within it.
[Consumption]—Deals Shadow damage to all enemies within the void zone. Instant. 2500-2800 Shadow damage every second
Ick'thys the Unfathomable yells: I laugh at you, feeble <name>, but I will oblige. Now, let us return to my master, below!