Here's the statblock you ordered:
Name: Aarinaias
Size and Type: Medium-Sized Undead (Outsider)
Hit Dice: 7d12 +14 (56 hp)
Initiative: +5 (+1 Dex, +4 Improved Initiative)
Speed: 40 ft.
AC: 15 (+1 Dex, +4 Natural)
Attacks: Slam +9 melee, Bite +9 melee
Damage: Slam 1d10 +4, Bite 1d8 +4 (+ 1d6 Acid Damage)
Face/Reach: 5 ft. by 5 ft./10 ft.
Special Abilities: Avoral-Like Vision*, Fear Aura, Immunities, Lay on Hands, Shadowy, Spell-Like Abilities, Spit, Tongues, True Seeing
Special Qualities: Undead
Saves: Fort +6, Ref +5, Will +4
Abilities: Str 18, Dex 12, Con 14, Int 8, Wis 11, Cha 8
Skills: Animal Empathy +10, Concentration +8, Hide +10, Knowledge (any two) or Craft (any two) +9, Listen +10, Move Silently +13, Sense Motive +13, Spellcraft +9, Spot +18*
Feats: Improved Initiative, Skill Focus (Move Silently), Skill Focus (Sense Motive)
Climate/Terrain: Any land or underground
Organization: Solitary
Challenge Rating: Ummm...no good at these

Alignment: Always Chaotic Evil
Treasure: No coins; double goods; standard items
Advancement: N/A
Improvement: N/A