Changes

Diablo is the act boss Act Boss of [[Act Four]], and must defeated to complete the [[Quests_Act_Four#Quest_Three:_Terror.27s_End|Terror's End quest]]. This quest ends the game in ''Diablo II'', and enables access to Act Five in ''Diablo II: Lord of Destruction''. Diablo is found in the Chaos Sanctuary. He appears in the center of the large pentagram after the five seals have been opened and the three seal bosses have either been killed or moved lured out of the Chaos Sanctuary.

Diablo is the Lord of Terror, and the youngest of the three {{iw|Prime_Evils Prime Evil}} brothers. The pursuit of him Diablo and long the battle to destroy his soul stone figures prominently in soulstone is the focal point of the game story and the lore in the game manuals for ''Diablo'' and ''Diablo II''.

Like many of the monsters in Diablo II, Diablo was a lot harder more difficult in earlier versions of the game. Prior to v1.08, his Firestorm (ground fire) attack could insta-instantly kill virtually almost any character who took it at point blank, range since there were so many overlapping pixels of flame at melee rangeflames. Maximum fire resistance was essential, along with fire absorption, and digging in for a long toe-to-toe slugfest fight with Diablo was almost sure suicide. Hit -and -run tactics had to be employed, in those daysorder to survive back then.

v1.08 made Diablo much less dangerous, and v1.10 nerfed him even further. Diablo's Firestorm is does much reduced in less damage, and his pink lightning hose no longer touches characters battling him at melee range, though it can still be quite dangerous to ranged attackers.

Various forms of Diablo abound exist in D2X. You In addition to the regular version of Diablo, you may also encounter [[Uber Diablo]], or [[Pandemonium Diablo]], on in the [[Special Quests]] added in in v1.10 and v1.11.

Diablo deals 7x seven times his normal damage to player minions, making it hard to keep [[mercmercenaries]]s or [[summon]]s summoned minions alive.

Diablo spent two centuries slowly working to corrupt the {{iw|Soulstone Soulstone}} that imprisoned him. In time, he was able to extend his influence into the surrounding area of Khanduras and corrupt both {{iw|King_Leoric King Leoric}} and his archbishop, {{iw|Lazarus Lazarus}}. The King proved too strong to fully control, so the Demon took possession of his son, {{iw|Prince_Albrecht Prince Albrecht}}. Diablo then began to shape an outpost of [[Hell]] within the catacombs that ran beneath the town of {{iw|Tristram Tristram}}. By spreading terror into the surrounding countryside, the [[Demon]] demon was able to attract many heroes who came to cleanse the land of evil. By the time the strongest of these heroes reached this goal, though, he had become fully influenced by the will of Diablo. In his twisted state, this adventurer believed that the only way to fully control the Demon was to plunge the shard of the Soulstone into his own head. This, of course, was exactly what Diablo had planned as the Demon now had an even stronger body to use to find his brothers and complete his ultimate plan...

* Diablo is vulnerable when charging, since he will run very slowly if slowed by cold attacks, the Holy Freeze aura, the Decrepify curse, etc. Ranged attackers can land many, many shots while Diablo slow motion bounds slowly charges towards the location where they were standing in when he began the charge.

Diablo uses a variety of spells to supplement his [[melee]] strikes. Several of these hit for physical + and elemental damage, making physical resistance useful for characters who wish to survive the battle.

Like the other act bosses, Diablo does not regenerates regenerate hit points.

All [[SuperUniques]] (except for [[Uber Diablo]]) are found in roughly the same location every game, on all three difficulty levels. (Except for the [[Uber Monsters]] who are only found on in the [[Hell]] Difficulty).)

| '''Act 4:''' Chaos Sanctuary. Diablo appears in the center of the pentagram once all five seals have been opened and the 3 three seal bosses are either dead or removed lured away from the Chaos Sanctuary.