Finally got one done in remarkably short time:<br/><br/>Base Monster Type:<br/><br/>Kelvezu<br/><br/>19HD creature base<br/><br/>Ability Scores: Str 21 Dex 33 Con 16 Int 17 Wis 16 Cha 16<br/>Spd: 30'/ Fly 60' Good<br/>AC: 40 (10+11 Dex +15 natural+4 armor); Touch 21 Flat-Footed 40<br/>Attacks: +1 Scimitar of Greater Wounding and Slow-burst +21/+16/+11 And +1 Dagger of wounding and Deadly Precision (+21/+6)<br/>Damage: +1 Scimitar of Greater Wounding and Slow-burst (1d6+6/18-20 plus Poison plus Greater Wounding Plus Slow on Critical) and +1 Dagger of Wounding and Deadly Precision (1d4+3/19-20 plus Poison)<br/>Special Attacks: Poison, Poison Bite, Sneak Attack +13d6+2, Spell-Like Abilities, Death Attack (DC: 25), Spells<br/>Special Qualities: DR 20/+2, Enhanced Detection, Evasion, Outsider Traits, Tanar'ri Traits, SR 38, Summon Tanar'ri, Improved uncanny Dodge, Alternate forms<br/><br/>Feats: Alertness, Improved Initiative, Improved Two-Weapon Fighting, Two-Weapon Fighting, Weapon Finesse, Vile Martial Strike, Ability Focus (Death Attack), Quicken Spell-like Ability, Venomous Strike, At Home in the Dark<br/><br/>Spell-Like Abilities (Racial) At-will: Deeper Darkness, Desecrate, Detect Good, Detect Law, Greater Dispelling, Improved Invisibility (Self Only), Read Magic, Suggestion, Teleport without Error (Self only +50 lbs objects), Tongues (Self Only), Unhallow: CL 18; Save DC 13+spell Level)<br/><br/>Enhanced Detection: Always has Detect Magic and See Invisibility Active<br/><br/>Sneak Attack: 13d6+2<br/><br/>Poison: Fort Save 19; 1d6 Con damage<br/><br/>Templates: Yuan-Ti (CR+1)<br/><br/>Gain Poison Bite (ie bite attack 1d4+50% str; poison: 1d4 con repeat)<br/>Psionic Abilities: Poison (as a 10th Level Caster), Polymorph Self (Snakes or Serpents only) (At-will)<br/>Snake Venom Immunity<br/>Spell Resistance +12<br/>+2 Con<br/>Alertness Bonus Feat<br/><br/>Shadow-Walker (CR+1)<br/>(Page 72 of Unapproachable East)<br/><br/>Gain Spell-Like Abilities: 3/day: Shadow Walk, Dimension Door, Shadow Spray, Shadow Mask | 2/day: Displacement | 1/day: Black Tentacles<br/><br/>Gain Light-Blindness Special Quality<br/>+2 Dex -2 Con<br/>+4 Hide<br/><br/>Note: His Snake form is unique (for its' type) that it's a large viper class with shadowy-black scales with a red underbelly and small horns protruding from behind the head and has his trademark bright violet colored eyes.