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 in the Central Transfer Chamber

Reward
 * 2,500 XP
 * 7500 Dwarven reputation points (in Hard Mode)

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 histories 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.
 * Clear the lava pool of at least the stationary Destroyer of Lives in the direct path to the Great Destroyer. It is not necessary to kill all of them.
 * 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 healing skill. Otherwise, switch to life stealing or health degeneration while the Great Destroyer is submerged.
 * 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 are only a drain on energy because burning is reapplied every 3 seconds in lava. Instead, bring Light of Deliverance and spam it to heal through the burning.
 * Bringing a Ritualist with Recuperation and Recovery to place just outside the lava pool when you first enter will significantly help with burning.
 * Frigid Armor can be a great help to your monks, as it stops the burning effect. With 8 Water Magic and a 20% enchanting mod, it can be kept up almost continuously.
 * Using Pain Inverter on the Great Destroyer will make it very easy to defeat him, as when he casts any of his nukes he will take 80 damage for each ally hit which comes to a total of 640 damage with 8 allies hit.
 * Interrupting ANY of the Great Destroyers skills will result in some heavy damage so beware and only interrupt Lava Wave and Call of Destruction.
 * Easily doable with two people with heroes. Bring 2 LoD monks (3 if you're unsure), a ranger with interrupts, a blood/degen necro or mesmer, a couple of air spikers, and whatever else. Simply attack and heal, and cycle Pain Inverter between the two humans.