Act 4 Bosses

Act Boss

 * Diablo, Lord of Terror

Quest Boss

 * Izual's Guardians
 * Izual's Servant - The Essence of Fire
 * Izual's Servant - The Essence of Ice
 * Izual's Servant - The Essence of Lightning
 * Izual's Servant - The Essence of Venom
 * Izual's Servant - The Essence of Magic
 * Izual's Servant - The Essence of Stone
 * Izual
 * Hell Forge Dragon
 * Chaos Sanctuary Seal Bosses
 * Lord De Seis, Ascendant of Torture
 * Flesh Ripper, Diablo's Handmaiden
 * Amon, Grand Vizier of Chaos
 * Hell's Gate Trio
 * Adramalech, Commander of Hell
 * Naberius, Grand Marchioness of Hell
 * Tartaruchi, Guardian of Hell's Gate

Way Point Key Boss

 * Izual's Faithful

Superuniques

 * Darkwing
 * Corpsemourne
 * Taint Breeder
 * Prince of Hell