The Shadow Over Oshu'gun

Objectives
Summon and defeat Invalidus.
 * Invalidus slain
 * Shaman Stone (provided)

Description
The void lord Invalidus stands atop the peak of gorging itself upon the souls of the dead.

Even the fallen void terrors that you slew only served to feed the monster.

If we do not act now, Invalidus will grow too powerful to encounter alone.

At each of the ritual sites in the Twisting Nether, there is a crystal filled with the powers of the void. Disturb the void crystal and Invalidus will sense your presence.

Be ready, Invalidus will waste no time in attempting to feed on your soul.

Rewards
The following spell will be cast on you: Leave Twisting Nether

You will also receive:
 * 950 XP
 * 950 XP