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Twilight Orb is a random world drop from level 39-45 creatures.

Item Suffix	Stats Bonus
of Arcane Wrath	+13-14 Arcane Spell Damage
of the Whale	+6 Stamina, +6 Spirit
of Holy Wrath	+13-14 Holy Spell Damage
of the Owl	+6 Intellect, +6 Spirit
of Spirit	+9-10 Spirit
of the Eagle	+6 Intellect, +6 Stamina
of the Falcon	+6 Intellect, +6 Agility
of Healing	+20 Healing Spells and +7 Damage Spells, +22 Healing Spells and +8 Damage Spells
of Shadow Wrath	+13-14 Shadow Spell Damage
of Frozen Wrath	+13-14 Frost Spell Damage
of the Wolf	+6 Spirit, +6 Agility
of Fiery Wrath	+13-14 Fire Spell Damage
of Intellect	+9-10 Intellect

Patch 1.3.0 (07-Mar-2005): Twilight Orb is no longer Warlock only.