Nightshade

Members:

CR: 18
XP: 153,600
Size: Gargantuan
Type: Undead
Tags: extraplanar, nightshade
Initiative: +4
Senses: darksense, darkvision 120 ft., detect magic, low-light vision, tremorsense 120 ft.
AC: 33, touch 6, flat-footed 33 (+27 natural, –4 size)
HP: 312 (25d8+200)
Saves: Fort +16, Ref +10, Will +23
Speed: 30 ft., burrow 60 ft.
Melee: bite +32 (4d10+18/19–20 plus 4d6 cold and grab), sting +32 (4d6+18/19–20 plus 4d6 cold and poison)
Space: 20 ft.
Reach: 20 ft.
Abilities: Str 41, Dex 10, Con —, Int 20, Wis 21, Cha 23
Attacks: Base Atk +18; CMB +37 (+41 grapple); CMD 47 (can't be tripped)
Defenses: DR 15/good and silver; Immune cold, undead traits; SR 29
Feats: Combat Expertise, Command Undead, Critical Focus, Greater Vital Strike, Improved Critical (bite), Improved Critical (sting), Improved Initiative, Improved Vital Strike, Iron Will, Power Attack, Quicken Spell-Like Ability (cone of cold), Staggering Critical, Vital Strike
Skills: Intimidate +34, Knowledge (arcana) +33, Knowledge (planes) +30, Knowledge (religion) +33, Perception +33, Sense Motive +33, Spellcraft +33, Stealth +16 (+24 in darkness), Swim +40; Racial Modifiers +8 Stealth in dim light and darkness
Languages: Abyssal, Common, Infernal; telepathy 100 ft.
Organization: solitary or pair
Treasure: standard