Naga, Sinomen - Constrictor (CR 3)
Huge Humanoid (Reptilian)
Alignment: Usually lawful neutral
AC: 12 (-2 size, +4 natural), touch 8, flat-footed 12
Hit Dice: 4d8+16 (34 hp)
Fort +5, Ref +4, Will +6
Speed: 20 ft.
Space: 15 ft./15 ft.
Base Attack +3; Grapple +7
Attack: Slam +7 melee
Full Attack: Slam +7 melee
Damage: Slam 1d6+7
Special Attacks/Actions: Improved grab, constrict 1d6+7
Abilities: Str 20, Dex 11, Con 18, Int 13, Wis 16, Cha 13
Special Qualities: Naga qualities
Feats: Iron Will; Skill Focus (heal)
Skills: Heal +13, Knowledge (arcana) +8, and Knowledge (religion) +8
Advancement: By character class
Climate/Terrain: Temperate and warm forest
Organization: Solitary, pair, or band (3-6)
Constrictors are loath to enter into battle, since their role among the nagas is that of a religious leader and speaker of the communal mind. When forced into combat, constrictors often strike to subdue, crushing foes to unconsciousness within their enormous serpentine coils.
Improved Grab (Ex): To use this ability, the constrictor mist hit with its slam attack. If it gets a hold, it can constrict.
Constrict (Ex): A constrictor naga deals 1d6+7 points of damage with a successful grapple check against Large or smaller creatures. It can deal normal or subdual damage as it desires, with no grapple check penalty in either case.
Telepathy (Ex): Nagas are all part of a communal consciousness they call the Akasha. This shared consciousness facilitates communication between nagas near and far, and contains the memories of their entire species. A group of nagas within 30 feet of each other are in constant communication. If one is aware of a particular danger, they all are. If one in a group is not flat-footed, none of them are. No naga in a group is considered flanked unless all are.
Taint Immunity (Ex): All nagas are immune to the Shadowlands Taint. They can still be harmed by effects such as the cloud of Taint spell, but they can never have a Taint score.
Alternate Form (Su): A female naga can transform her serpent tail into humanlike legs, as if using the polymorph self spell. Her size becomes Medium-size (regardless of her original size), and her speed becomes 30 feet (and she loses any swim speed she may have possessed). Changing form in this manner is a full-round action.
Danger Sense (Ex): Cobras retain their Dexterity bonus to AC (if any) regardless of being caught flat-footed or struck an invisible attacker. (They still lose their Dexterity bonus if immobilized.)
These creatures are scaly and usually cold-blooded. The reptilian subtype is only used to describe a set of humanoid races, not all animals and monsters that are truly reptiles.