Chaos Roc (CR 22)

Colossal Magical Beast
Alignment: Always chaotic neutral
Initiative: +2 (Dex); Senses: Spot +3 and Spote +21

AC: 25 (-8 size, +2 Dex, +21 natural), touch 4, flat-footed 23
Hit Dice: 33d10+297 (478 hp); DR: 15/Epic
Fort +27, Ref +20, Will +14
Speed: 40 ft., fly 120 ft. (average)
Space: 30 ft./15 ft.
Base Attack +12; Grapple +27
Attack: Claw +41 melee or wings + 41 melee
Full Attack: 2 claws +41 melee and bite +36 melee, or 2 wings +41 melee
Damage: Claw 2d8+16, bite 4d6+8, wing 2d6+16
Special Attacks/Actions: Prismatic spray (DC 19), swallow whole
Abilities: Str 42, Dex 15, Con 28, Int 2, Wis 13, Cha 13
Special Qualities: SR 33
Feats: Ability Focus (prismatic spray); Combat Reflexes; Dodge; Flyby Attack; Hover; Iron Will; Mobility; Power Attack; Snatch; Wingover
Skills: Spot +3, Spote +21, and Survival +19
Advancement: 34-99 HD (Colossal)
Climate/Terrain: Temperate and warm mountains
Organization: Solitary or pair
Treasure/Possessions: Standard

Source: Monster Manual II

Prismatic Spray (Su): A chaos roc can emit a spray of colored light from its eyes at will. The effect is like that of the spell (caster level 20th; save DC 27), except that the range is 105 feet, and only the colors red, orange, yellow, green, blue, and indigo are present (roll 1d6 instead of 1d8 on the table given for prismatic spray in the Player's Handbook).

Swallow Whole (Ex): A chaos roc can swallow a snatched opponent that is Huge or smaller by making a successful grapple check (grapple bonus +65). Once inside the roc, the opponent takes 2d8+12 points of bludgeoning damage and 1d8 points of acid damage per round from the bird's gizzard. A successful grapple check allows the swallowed creature to climb out of the gizzard and return to the roc's beak, where another successful grapple check is needed to get free. Alternatively, a swallowed creature can try to cut its way out with either claws or a light piercing or slashing weapon. Dealing at least 25 points of damage to the gizzard (AC 20) in this way creates an opening large enough to permit escape. Once a single swallowed creature exits, muscular action closes the hole; thus, another swallowed opponent must cut its own way out. A chaos roc's gizzard can hold 2 Huge, 8 Large, 32 Medium-size, or 128 Small or smaller creatures.

Feats: A creature that is flung by a chaos roc after being snatched travels 100 feet and takes 10d6 points of damage. If the chaos roc is flying, the creature takes this damage or the appropriate falling damage, whichever is greater.

Chaos rocs prefer to attack on the wing, using their prismatic spray ability to blind prey before attempting to snatch it up. Any additional damage done by the spray effect simply makes the snatch attempt easier.