Phantom Hallucinations can be found in Sword's Rest of the Halls of Reflection in Icecrown Citadel. They are summoned in by Phantom Mages at the same percentage of health as the mage. They take twice the normal amount of damage dealt to them.
[Fireball]ωϖ (Heroic modeωϖ) 40 yd range—Hurls a fiery ball that causes 5225 to 5775 Fire damage. 3 sec cast on Normal. 6175-6825, 2.5 sec cast on Heroic
[Flamestrike]ωϖ (Heroic modeωϖ) 40 yd range—Calls down a pillar of fire, burning all enemies within the area for 3700 to 4300 Fire damage and an additional 6000 Fire damage over 8 sec. 1.5 sec cast. 4625-5375, 8000/8 on Heroic (2 sec cooldown)
[Frostbolt]ωϖ (Heroic modeωϖ) 40 yd range—Launches a bolt of frost at the enemy, causing 4750 to 5250 Frost damage and slowing movement speed by 50% for 4 sec. 2.5 sec cast on Normal. 5225-5775, 2 sec cast on Heroic
[Chains of Ice]ωϖ 40 yd range—Forms icy chains around the enemy, locking the target in place for 6 sec. 1 sec cast
[Hallucination]ωϖ (Heroic modeωϖ) 15 yd range—Deals 6000 Arcane damage to all enemies near the Hallucination when it dies. Instant. 10,000 damage on Heroic