LG Colossal dragon (water)
Init +12; Senses darkvision 120 ft., detect chaos, detect evil, detect magic, low-light vision, scent, true seeing; Perception +40
AC 36, touch 10, flat-footed 28 (+8 Dex, +26 natural, –8 size)
hp 385 (22d12+242); regeneration 15 (epic)
Fort +24, Ref +23, Will +20
Defensive Abilities freedom of movement, scintillating scales; DR 15/epic; Immune aging, mind-affecting effects, paralysis, poison, sleep, sonic; SR 31
Speed 40 ft., swim 80 ft.; swim the sky
Melee bite +30 (3d8+16/19–20), tail +30 (3d6+16 plus grab)
Space 30 ft.; Reach 30 ft.
Special Attacks constrict (tail, 3d6+24), gaze
Spell-Like Abilities (CL 20th; concentration +28)
Constant—detect chaos, detect evil, detect magic, true seeing
At will—dispel magic, haste, mark of justice, rainbow pattern (DC 22)
3/day—control water, dream, foresight, scintillating pattern
1/day—control weather, earthquake, move earth, time stop
Str 42, Dex 26, Con 32, Int 22, Wis 25, Cha 27
Base Atk +22; CMB +46 (+50 grapple); CMD 64 (can't be tripped)
Feats Awesome Blow, Blind-Fight, Combat Reflexes, Improved Bull Rush, Improved Critical (bite), Improved Initiative, Improved Overrun, Improved Vital Strike, Lightning Reflexes, Power Attack, Vital Strike
Skills Diplomacy +33, Knowledge (arcana, geography, history, nature, and religion) +31, Perception +32, Sense Motive +32, Spellcraft +31, Stealth +17, Survival +32, Swim +41
Languages Aquan, Auran, Celestial, Common, Draconic, Ignan, Sylvan, Terran
Environment any lake or river
Freedom of Movement (Ex) A rainbow serpent is under the constant effect of freedom of movement, as the spell of the same name. This effect cannot be dispelled.
Gaze (Su) Dazed for 1d4+1 rounds, 30 feet, Will DC 29 negates. The save DC is Charisma-based.
Scintillating Scales (Su) A rainbow serpent is cloaked in light. It sheds bright light within 30 feet of its space. Attacks against a rainbow serpent suffer a 50% miss chance, as if the serpent had total concealment. Creatures not relying on sight to not suffer this miss chance.
Swim the Sky (Ex) A rainbow serpent can swim through the air as if it were water. While doing so, the rainbow serpent uses its normal swim speed, and counts as if it were swimming, not flying.