A Time for Heroes

Overview
Summary
 * 1) The Great Destroyer awaits you outside the Central Transfer Chamber. Speak to High Priest Alkar to commence the attack.
 * 2) Defeat the Great Destroyer.

Obtained from
 * High Priest Alkar

Reward
 * 2,500 XP

Dialogue
 * "In every age there are heroes and villains, victors and vanquisher, saviors and destroyers. You stand today at a precipice between the past and the future, facing a choice with effects that will ripple throughout time. Becoming the stuff of legends of history,s forgotten. may the future hold a world where your exploits this day are told as an inspirational tale of courage, persistence and hope. Go now. Meet the Great Destroyer, and may the gods smile on us all."

Walkthrough

 * The quest takes place in a separate explorable area reached by talking to High Priest Alkar.
 * First clear the lava pool of all the stationary destroyers.
 * Stand on the hardened lava crusts, but beware that the Great Destroyer will convert them to lava using Lava Ground. Eventually there will be no safe area in the room.
 * The Great Destroyer will summon a random group of 3-5 destroyers using Call of Destruction. Be sure to interrupt this skill, and brace immediately for Enraged Blast.
 * Consider also interrupting Lava Wave as it is the Great Destroyer's only heal. Otherwise, switch to life stealing or health degeneration while the Great Destroyer is submerged.
 * If attempting the quest with heroes and henchmen, bring Mhenlo or a monk hero with Light of Deliverance.
 * Ward of Stability can help immensely against the repeated knockdown of Lava Blast.
 * Consider bringing skills such as Frigid Armor or Avatar of Melandru that negate burning. Party-wide condition removal by skills such as Extinguish, Cautery Signet and Martyr can help in a pinch, but they might end up being a drain on energy. Burning is reapplied every 3 seconds in lava.
 * Consider having Rangers in the party. Bring interrupts (Punishing Shot, Distracting Shot) and some degen (Apply Poison). If you have all three Ranger heroes (Margrid the Sly, Acolyte Jin and Pyre Fierceshot), beating the boss will be very easy.
 * It is probably worth noting that the effect Stout-Hearted will do slightly extra damage to the destroyers, It might also work on The Great Destroyer while he is submerged, since it seems to be a life-stealing effect.