Restoring Grenth's Monuments

Overview
Summary:
 * 1) Summon the Reaper of the Chaos Planes
 * 2) Summon the Reaper of the Ice Wastes
 * 3) Summon the Reaper of the Bone Pits
 * 4) Summon the Reaper of the Spawning Pools
 * 5) Summon the Reaper of the Forgotten Vale
 * 6) Summon the Reaper of the Twin Serpent Mountains

Obtained from:
 * Reaper of the Labyrinth in The Underworld

Requirements:
 * Clear the Chamber

Reward:
 * 10,000 XP

Dialogue:
 * "The Terrorwebs have imprisoned the Reapers of the Underworld. Without them, the statures of Grenth are not active, and the death godâ€™s control of his realm grows weaker. Reawaken the six reapers and help them return to their statues. Once the statues are active, you will find travel through the Underworld much easier."