Nightwave

is a Nightshade

CR: 20
XP: 307,200
Size: Colossal
Type: Undead
Tags: aquatic, extraplanar, nightshade
Initiative: +7
Senses: darksense, darkvision 120 ft., detect magic, low-light vision
AC: 36, touch 5, flat-footed 33 (+3 Dex, +31 natural, –8 size)
HP: 391 (29d8+261)
Saves: Fort +18, Ref +16, Will +25
Speed: fly 60 ft. (good), swim 60 ft.
Melee: bite +35 (5d10+22/19–20 plus 4d6 cold, energy drain, and grab), tail slap +30 (4d8+12/19–20 plus 4d6 cold)
Space: 30 ft.
Reach: 30 ft.
Abilities: Str 49, Dex 16, Con —, Int 22, Wis 21, Cha 25
Attacks: Base Atk +21; CMB +48 (+52 grapple); CMD 61 (can't be tripped)
Defenses: DR 15/good and silver; Immune cold, undead traits; SR 29
Feats: Combat Reflexes, Command Undead, Critical Focus, Greater Vital Strike, Improved Bull Rush, Improved Critical (bite, tail slap), Improved Initiative, Improved Vital Strike, Iron Will, Lightning Reflexes, Power Attack, Quicken Spell-Like Ability (cone of cold), Staggering Critical, Vital Strike
Skills: Fly +31, Intimidate +39, Knowledge (arcana) +38, Knowledge (planes) +35, Knowledge (religion) +38, Perception +37, Sense Motive +37, Spellcraft +38, Stealth +19 (+27 in darkness), Swim +59; Racial Modifiers +8 Stealth in dim light and darkness
Languages: Abyssal, Common, Infernal; telepathy 100 ft.
Organization: solitary
Treasure: standard