Izual mainly uses melee and cold attacks, so it's useful to have some cold resistance. His exact location is randomized, but upon approaching him, the quest log notification should appear and Izual can be heard grunting, 'Save yourself!' In Diablo II, players encounter Izual wandering on the Plains of Despair in the game's fourth act. Izual's maddened spirit remained bound to the tortured husk it had been forced into. The demon, Rakanoth, served as Izual's jailer during his time of imprisonment, but eventually abandoned the angel to roam the Plains of Despair. He helped the Three Brothers mastermind the Dark Exile -the soulstones would be corrupted, the Worldstone would be corrupted through them, and through the Worldstone, humanity would fall under the dominion of Hell. One secret Izual gave up to the Prime Evils was that of the soulstones, and how to corrupt them. To add insult to injury, Izual's spirit was bound within the form of a terrible creature which was summoned from the Black Abyss. He became a corrupt shadow of his former self-a fallen angel trusted neither by Heaven nor Hell. Twisted by their perverse power, he betrayed his own kind and give up Heaven's most guarded secrets. Izual, however, was overcome by the demonic legions and was captured by the Prime Evils. A new demonblade, Shadowfang, was nearing completion, and Izual was intent on destroying both the wielder and weapon.

The beginning of Izual's fall from grace came when he led an assault on the Hellforge-an assault against Tyrael's wishes, but was carried out nonetheless.

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