My "New World" Campaign (Lost Soul)

Lost Soul
Size/Type: Medium Undead (Incorporeal)
Hit Dice: 4d12 (26 hp)
Initiative: +5
Speed: Fly 30 ft. (perfect) (6 squares)
Armor Class: 15 (+1 Dex, +4 deflection), touch 15, flat-footed 14
Base Attack/Grapple: +2/—
Attack: Incorporeal touch +3 melee (1d4 Wisdom drain)
Full Attack: Incorporeal touch +3 melee (1d4 Wisdom drain)
Space/Reach: 5 ft./5 ft.
Special Attacks: Babble, madness, Wisdom drain
Special Qualities: Darkvision 60 ft., incorporeal traits, +2 turn resistance, undead traits
Saves: Fort +1, Ref +4, Will +4
Abilities: Str 0, Dex 12, Con 0, Int 11, Wis 11, Cha 18
Skills: Hide +8, Intimidate +7, Listen +7, Search +4, Spot +7, Survival +0 (+2 following tracks)
Feats: Improved Initiative, Lightning Reflexes
Environment: Any
Organization: Solitary
Challenge Rating: 3
Treasure: None
Alignment: Always neutral evil
Advancement: 5-12 HD (Medium)
Level Adjustment: —A lost soul is the spectral remains of someone driven to suicide by a madness that afflicted it in life. It craves only revenge and unrelentingly pursues those who tormented it in life and pushed it over the brink.A lost soul cannot speak intelligibly.
CombatA lost soul is unable to cause physical harm, although it doesn’t appear to know that. It keeps flailing away at enemies, yet it inflicts no wounds.
Babble (Su): A lost soul constantly mutters and whines to itself, creating a hypnotic effect. All sane creatures within 60 feet of the lost soul must succeed on a DC 16 Will save or be affected as though by a hypnotism spell for 2d4 rounds. This is a sonic mind-affecting compulsion effect.Creatures that successfully save cannot be affected by the same lost soul’s babble for 24 hours. The save DC is Charisma-based.
Madness (Su): Anyone targeting a lost soul with a thought detection, mind control, or telepathic ability makes direct contact with its tortured mind and takes 1d4 points of Wisdom damage.
Wisdom Drain (Su): A lost soul causes 1d4 points of Wisdom drain each time it hits with its incorporeal touch attack. On each such successful attack, it gains 5 temporary hit points.