Hey folks, I'm running a homebrew dungeon (Darkbridge Temple) in my Greyhawk campaign, and I just finished tomorrow's (er.., today's) main villian. Enjoy!
Guardian of the Dark Nexus
Sarkus the Pale, Male Ghoul, Clr3/Mnk9, CR 13; Size: M, Type UNDEAD; HD 12d12 (hp 96); Init +5 (+5 Dex); Spd Walk 60'; AC 27 (flatfooted 22, touch 21), Longsword (Blood Drinker) +13/+13/+8 (1d8+5 17-20/x2, critical hit grants wielder temp HP equal to damage inflicted) or Unarmed Strike +11/+11/+8 (1d10+3 20/x2, paralysis 1d6+2 min), Bite +13 (1d6, paralysis 1d6+2 min); SA: Improved Evasion (Ex), Evasion (Ex), Rebuke Undead 6/day, Stunning Attack 9/day (DC 17), Smite (Su) 1/day (+4 hit +3 damage), Flurry of Blows, Still Mind, Slow Fall (50 ft.), Purity of Body, Leap of the Clouds, Wholeness of Body (Su) 18 hp/day, Paralysis (Ex) Fort DC 19, Create Spawn (Su), Turn Resistance (Ex) +2, Undead; DarkVision 60'; AL: LE; Sv: Fort --, Ref +12, Will +12; Str 17, Dex 20, Con --, Int 14, Wis 16, Cha 16
Skills and Feats: Balance +14, Concentration +12, Escape Artist +8, Jump +12, Knowledge (History, Darkbridge) +4, Listen +12, Move Silently +13, Search +4, Speak Language (Abyssal, Common, Suel, Ur-Flannish), Spot +11, Tumble +23; Armor Proficiency (Heavy), Armor Proficiency (Light), Armor Proficiency (Medium), Deflect Arrows, Dodge, Exotic Weapon Proficiency, Expertise, Improved Trip, Improved Unarmed Strike, Martial Weapon Proficiency (longsword), Mobility, Multiattack, Shield Proficiency, Simple Weapon Proficiency, Spring Attack, Weapon Finesse (bite), Whirlwind Attack
Possessions: Blood Drinker (+2 longsword, keen, body feeder); Ring of Force Shield +2; Bracers of Armor +4; Cloak of Displacement (50% miss chance); Flowing Black Silk Sash (speed)
Deity: Tharizdun; Domains: Destruction (smite), Evil (cast evil spells at +1 caster level)
Cleric Spells (4/3+1/2+1):
Level 0: Inflict Minor Wounds x 3, Resistance
Level 1: Comprehend Languages, Doom, Entropic Shield, Protection from Good
Level 2: Bull's Strength, Death Knell, Desecrate
Sarkus is the sole guardian of the Dark Nexus, a key feature of Darkbridge Temple. This chamber was used to communicate and travel to the infernal planes by means of the Dark Altar, which controls the Nexus. The Nexus itself is constructed from corrupted temple menhirs originally dedicated to seven good and neutral Flan deities. These great stones are made to bleed by a great curse placed upon them, and it is this cursed Earth Blood which has sustained Sarkus these many centuries. By drinking this blood, Sarkus has bound himself to the Dark Altar, and thus has some limited control over the Nexus. By channeling negative energy through the Altar (via his Rebuke Undead power), Sarkus has learned to summon infernal aid when threatened. Each round Sarkus channels though the Altar, 1d3 Vrock demons will appear through the Nexus to attack his opponents. The summoned tanar'ri will remain in the temple for six minutes before returning to the Abyss.
Largely starved for conversation for the last two thousand years, Sarkus would much rather chat your ear off than fight, however. Mad as a hatter, and utter convinced of his towering expertise on any topic you care to mention, he will gladly lecture you to your grave. Sarkus knows much about the extensive history of the Darkbridge Temple site, and isn't shy about sharing it with a properly fawning, boot licking audience. Insolent visitors get nothing but abuse.
Sarkus is just the sort of friendly villian to tell you all his plans for your horrible demise, if you'll just ask him nicely!
*****
I used both PCGen and a hand modified template (from Slayer's Guide to Undead), plus a couple of custom magic items. You're more than welcome to note any significant screw-ups - thanks!
Guardian of the Dark Nexus
Sarkus the Pale, Male Ghoul, Clr3/Mnk9, CR 13; Size: M, Type UNDEAD; HD 12d12 (hp 96); Init +5 (+5 Dex); Spd Walk 60'; AC 27 (flatfooted 22, touch 21), Longsword (Blood Drinker) +13/+13/+8 (1d8+5 17-20/x2, critical hit grants wielder temp HP equal to damage inflicted) or Unarmed Strike +11/+11/+8 (1d10+3 20/x2, paralysis 1d6+2 min), Bite +13 (1d6, paralysis 1d6+2 min); SA: Improved Evasion (Ex), Evasion (Ex), Rebuke Undead 6/day, Stunning Attack 9/day (DC 17), Smite (Su) 1/day (+4 hit +3 damage), Flurry of Blows, Still Mind, Slow Fall (50 ft.), Purity of Body, Leap of the Clouds, Wholeness of Body (Su) 18 hp/day, Paralysis (Ex) Fort DC 19, Create Spawn (Su), Turn Resistance (Ex) +2, Undead; DarkVision 60'; AL: LE; Sv: Fort --, Ref +12, Will +12; Str 17, Dex 20, Con --, Int 14, Wis 16, Cha 16
Skills and Feats: Balance +14, Concentration +12, Escape Artist +8, Jump +12, Knowledge (History, Darkbridge) +4, Listen +12, Move Silently +13, Search +4, Speak Language (Abyssal, Common, Suel, Ur-Flannish), Spot +11, Tumble +23; Armor Proficiency (Heavy), Armor Proficiency (Light), Armor Proficiency (Medium), Deflect Arrows, Dodge, Exotic Weapon Proficiency, Expertise, Improved Trip, Improved Unarmed Strike, Martial Weapon Proficiency (longsword), Mobility, Multiattack, Shield Proficiency, Simple Weapon Proficiency, Spring Attack, Weapon Finesse (bite), Whirlwind Attack
Possessions: Blood Drinker (+2 longsword, keen, body feeder); Ring of Force Shield +2; Bracers of Armor +4; Cloak of Displacement (50% miss chance); Flowing Black Silk Sash (speed)
Deity: Tharizdun; Domains: Destruction (smite), Evil (cast evil spells at +1 caster level)
Cleric Spells (4/3+1/2+1):
Level 0: Inflict Minor Wounds x 3, Resistance
Level 1: Comprehend Languages, Doom, Entropic Shield, Protection from Good
Level 2: Bull's Strength, Death Knell, Desecrate
Sarkus is the sole guardian of the Dark Nexus, a key feature of Darkbridge Temple. This chamber was used to communicate and travel to the infernal planes by means of the Dark Altar, which controls the Nexus. The Nexus itself is constructed from corrupted temple menhirs originally dedicated to seven good and neutral Flan deities. These great stones are made to bleed by a great curse placed upon them, and it is this cursed Earth Blood which has sustained Sarkus these many centuries. By drinking this blood, Sarkus has bound himself to the Dark Altar, and thus has some limited control over the Nexus. By channeling negative energy through the Altar (via his Rebuke Undead power), Sarkus has learned to summon infernal aid when threatened. Each round Sarkus channels though the Altar, 1d3 Vrock demons will appear through the Nexus to attack his opponents. The summoned tanar'ri will remain in the temple for six minutes before returning to the Abyss.
Largely starved for conversation for the last two thousand years, Sarkus would much rather chat your ear off than fight, however. Mad as a hatter, and utter convinced of his towering expertise on any topic you care to mention, he will gladly lecture you to your grave. Sarkus knows much about the extensive history of the Darkbridge Temple site, and isn't shy about sharing it with a properly fawning, boot licking audience. Insolent visitors get nothing but abuse.
Sarkus is just the sort of friendly villian to tell you all his plans for your horrible demise, if you'll just ask him nicely!

*****
I used both PCGen and a hand modified template (from Slayer's Guide to Undead), plus a couple of custom magic items. You're more than welcome to note any significant screw-ups - thanks!