Ventifakt here uses the feat Improved Toughness from the Complete Warrior but all it does is give him 1 extra HP per hit die.

Ventifakt Gronthean, Evil Elven Sorcerer _____ CR 10
Male elf sorcerer 10
LE Medium humanoid (elf)
Init +4; Senses low-light vision; Listen +1, Spot +3
Languages Common, Elf

AC 18, touch 15, flat-footed 14
hp (42) (10 HD)
Immune sleep
Fort +4, Ref +7, Will +8

Spd 30 ft.
Melee spear +4 (1d8-1/x3)
Base Atk +5; Grp +4
Combat Gear necklace of fireballs (type V)
Spells Known (CL 10th)

5th (3/day)—summon monster V
4th (6/day)—mass enlarge person, confusion (DC 20 will)
3rd (7/day)—haste, deep slumber (DC 19 will), magic circle against good
2nd (7/day)—scare (DC 16 will), invisibility, eagle's splendor, scorching ray
1st (7/day)—shield, magic missile, mount, ray of enfeeblement, color spray (DC 15)
0 (6/day)—detect magic, read magic, light, mage hand, message

Abilities Str 8, Dex 18, Con 12, Int 10, Wis 12, Cha 18
SQ elf traits, summon familiar
Feats Spell Focus(Enchantment), Greater Spell Focus(Enchantment), Improved Toughness, Leadership
Skills Concentration +14, Spellcraft +13
Possessions combat gear, spear, bracers of armor +2, amulet of natural armor +1, ring of protection +1, 1,850 gp

Background Ventifakt is a Fanatical supporter of The Knights of Death and recently became a full-fledged Member. The only members of the KofD he doesn't like are Wiegraf and Miluda due to their "Tainted Elvenhood". Also, He hopes to one day become a Lich.