Dragon, Orange Great Wyrm (CR 25)

Gargantuan Dragon (Water)
Alignment: Always neutral evil
Initiative: +0; Senses: blindsense 60 ft., darkvision120 ft., low-light vision, and keen senses
Languages: Draconic

AC: 45 (-4 size, +39 natural), touch 6, flat-footed 45
Hit Dice: 38d12+304 (551 hp); DR: 20/magic
Fort +29, Ref +21, Will +27
Speed: 40 ft., fly 200 ft. (clumsy), swim 40 ft.
Space: 40 ft./15 ft.
Base Attack +38; Grapple +64
Attack: 1 bite +48, 2 claws +43, 2 wings +43, 1 tail slap +43, 1 crush +43, 1 tail sweep +43
Damage: 1 bite 4d6+14, 2 claws 2d8+7, 2 wings 2d6, 1 tail slap 2d8, 1 crush 4d6, 1 tail sweep 2d6
Special Attacks/Actions: Breath weapon 24d10 (37)
Abilities: Str 39, Dex 10, Con 27, Int 30, Wis 23, Cha 22
Special Qualities: Poison immunity, water breathing, Pass without trace, Control water, Heat metal, Suggestion, Hallucinatory terrain, SR 30, Fear aura (DC 35), CL 18th
Feats: #Feats: 13
Skills: Skill points: 386
Advancement: 39+ HD (Colossal)
Climate/Terrain: Warm forests
Organization: Solitary (1 dragon, any age), clutch (1d4+1 wyrmlings, very young, young, juvenile, or young adults), family (pair of mature adults and 1d4+1 offspring)
Treasure/Possessions: Triple Standard

Source: Dragon #248
Dragon Compendium Vol. 1

Breath Weapon (Su): An orange dragon's breath weapon is a bizarre mixture of oily saliva and a deadly, explosive compound. When this compound is exposed to water or air, it detonates in a ferocious explosion. The dragon's oily saliva shields this mixture, but it quickly evaporates. Once it is gone, the compound explodes.

The orange dragon breathes this mixture in a line. Any creature caught in this area is covered with its sticky, gooey breath. A successful save allows a creature to avoid becoming covered in the dragon's breath weapon.

After 2 rounds, the mixture explodes in a 10-foot burst centered on each creature. The target creature takes full damage, with no saving throw, while all other creatures in the explosion's area save as normal for half damage. A creature takes damage from this breath weapon only once per detonation. A creature standing between two allies covered with the dragon's spew makes only one save and takes damage once, not once for each explosion. The two creatures covered by the breath weapon also take damage only once. They do not suffer damage from the blast centered on the other victim. An orange dragon's breath weapon recharges slower than that of other dragons. An orange dragon can use its breath weapon once every 1d6 rounds.

Poison Immunity (Ex): Orange dragons subsist on a wide variety of poisonous animals and plants in their jungle homes. They develop a natural immunity to poisons of all type.

Water Breathing (Ex): An orange dragon can breathe water as easily as air. It can use its spells, breath weapon, and other abilities underwater without restriction.

Spell-Like Abilities: 3/day - pass without trace, control water; heat metal; 1/day - suggestion, hallucinatory terrain.

Water Subtype

This subtype usually is used for elementals and outsiders with a connection to the Elemental Plane of Water. Creatures with the water subtype always have swim speeds and can move in water without making Swim checks. A water creature can breathe underwater and usually can breathe air as well.