Ssvaklor (CR 10)

Medium Dragon
Alignment: Always chaotic evil
Initiative: +1 (Dex); Senses: blindsense 60 ft., darkvision 60 ft., low-light vision, scent, Listen +17, and Spot +17
Languages: Common, Draconic, and Yuan-ti

AC: 22 (+1 Dex, +11 natural), touch 11, flat-footed 21
Hit Dice: 15d12+105 (202 hp); DR: 10/magic
Fort +16, Ref +10, Will +8
Speed: 40 ft., swim 40 ft.
Space: 5 ft./5 ft.
Base Attack +15; Grapple +19
Attack: Bite +14 melee*
Full Attack: Bite +14 melee* and 2 claws +9 melee*
Damage: Bite 2d6+9/19-20 plus poison*, claw 1d8+7* (*Includes adjustments for Power Attack feat.)
Special Attacks/Actions: Breath weapon, poison, spell-like abilities
Abilities: Str 19, Dex 12, Con 24, Int 9, Wis 8, Cha 12
Special Qualities: immunity to magic sleep effects, poison, and paralysis, SR 18
Feats: Cleave; Combat Reflexes; Improved Critical (bite); Improved Natural Attack (bite); Improved Natural Attack (claw); Power Attack
Skills: Bluff +19, Diplomacy +5, Disguise +1 (+3 acting), Intimidate +3, Jump +8, Listen +17, Sense Motive +17, Spot +17, Survival +17, and Swim +12
Advancement: 16-20 HD (Medium); 21-30 HD (Large); 31-45 HD (Huge)
Climate/Terrain: Temperate marshes
Organization: Solitary, pair, or clutch (3-5)
Treasure/Possessions: Double standard

Source: Monster Manual III

Breath Weapon (Su): 30-foot cone of poisonous gas, once every 1d4 rounds, damage 1d4 Con, Fortitude DC 24 half. The save DC is Constitution-based.

Poison (Ex): Injury, Fortitude DC 24, initial damage paralysis, secondary damage 1d4 Con. The save DC is Constitution-based.

Spell-like Abilities: 1/day - animal trance (DC 13), cause fear (DC 12), darkness (DC 13), entangle (DC 12). Caster level 15th.

Skills: A ssvaklor has a +8 racial bonus on any Swim check to perform some special action or avoid a hazard. It can always choose to take 10 on a Swim check, even if distracted or endangered. It can use the run action while swimming, provided it swims in a straight line.

Psionic Ssvaklors

If you are using the Expanded Psionics Handbook and running a psionic campaign, ssvaklors gain the psionic subtype, have power resistance 18 instead of spell resistance, and gain psi-like abilities.

Psi-Like Abilities: 1/day-aversion (duration 10 hours, DC 16*), control light, entangling ectoplasm, id insinuation (affects up to four creatures, no two of which can be more than 15 feet apart; DC 16*), psionic freedom of movement. Manifester level 7th. The save DCs are Charisma-based. These abilities replace ssvaklor's spell-like abilities.

*Includes augmentation for the ssvaklor's manifester level.