A Time for Heroes

Objectives

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

Obtained from
 * High Priest Alkar in the Central Transfer Chamber
 * Scrying Pool in Hall of Monuments (after first completion, select "I seek guidance" option)

Walkthrough
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 Cautery Signet and Martyr are only a drain on energy because burning is re-applied 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 or Avatar of Melandru can be a great help to your monks, as they stop the burning effect. With 8 ranks in Water Magic and a 20% longer enchanting mod, frigid armor 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.

Easily doable with two people and heroes. Bring two LoD monks (three 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.

Using a modified 55 hp monk build, this mission can be easily soloed (allowing "runs" of the mission)

Additionally, rangers with the touch ranger build can solo this mission by bringing 2 other touch rangers (heroes), one LoD hero monk, both healer henchmen, and 2 other henchmen who don't interrupt (Talon and Eve would be ideal - with Talon Silverwing being an extra tank and Eve for energy regeneration through blood ritual). This build will also work for Hard Mode.

Monsters

 * Destroyers
 * 28 Destroyer of Lives
 * 28 Destroyer of Bones
 * 28 Destroyer of Flesh
 * 28 Destroyer of Sinew
 * 28 Destroyer of Deeds
 * 28 Destroyer of Hope

Bosses

 * Destroyers
 * The Great Destroyer

Dialogues
Briefing from the Scrying Pool.