Vodyanoi (CR 3)

Medium Fey (Aquatic)
Alignment: Usually chaotic neutral
Initiative: +3 (Dex); Senses: low-light vision, Listen +10, and Spot +10
Languages: Common and Sylvan

AC: 17 (+3 Dex, +4 natural), touch 13, flat-footed 14
Hit Dice: 5d6+5 (22 hp)
Fort +2, Ref +7, Will +6
Speed: 30 ft., swim 60 ft.
Space: 5 ft./5 ft.
Base Attack +2; Grapple +4
Attack: Claw +6 melee
Full Attack: 2 claws +6 melee
Damage: Claw 1d4+2
Special Attacks/Actions: Control water, fish cloud, improved grab
Abilities: Str 15, Dex 16, Con 12, Int 12, Wis 14, Cha 11
Special Qualities: Amphibious, SR 16
Feats: Weapon Finesse; Weapon Focus (claw)
Skills: Bluff +8, Diplomacy +2, Disguise +0 (+2 acting), Hide +11*, Intimidate +10, Knowledge (nature) +3, Listen +10, Move Silently +11*, Spot +10, Survival +10, and Swim +10
Advancement: 7-10 HD (Medium)
Climate/Terrain: Cold aquatic
Organization: Solitary
Treasure/Possessions: Standard

Source: Frostburn

Control Water (Sp): A vodyanoi can use control water three times per day as a 10th-level sorcerer.

Fish Cloud (Sp): When submerged in water, a vodyanoi can summon a huge school of magic fish to provide concealment (similar to the fog cloud spell). This school of fish swims around the point the vodyanoi designates in a 20-foot radius. This cloud of fish obscures all sight, including darkvision, beyond 5 feet. A creature within 5 feet has concealment (20% miss chance). Creatures farther away have total concealment (50% miss chance, and the attacker can't use sight to locate the target). A strong current disperses the cloud of fish in 4 rounds. A very strong current disperses the fish in 1 round. The fish created by this spell are formed of magic; they are not real animals, and objects and energies pass through them as though they were not there. A vodyanoi can summon a fish cloud three times per day. The fish cloud remains for 40 minutes or until dispersed or dispelled. Vodyanoi sometimes use this ability to deceive villagers, making them think the vodyanoi have brought fish to their waters. When vodyanoi really want to reward people with, they use their Survival skill to lure fish into an area.

Improved Grab (Ex): To use this ability, a vodyanoi must hit a single foe of the same size or smaller with both claw attacks. It can then attempt to start a grapple as a free action without provoking attacks of opportunity. If it gets a hold, the vodyanoi often attempts to pin a foe and hold him underwater until he drowns.

Amphibious (Ex): Although vodyanoi live in water, they can survive out of water indefinitely.

Skills: *Vodyanoi gain a +8 circumstance bonus on Hide and Move Silently checks when in contact with a body of water. A vodyanoi gains 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.

Vodyanoi are wily fey, ready to ambush anyone who is already in the water or even at the water's edge. Sometimes a vodyanoi will use its power to sweep victims into a river by causing a sudden flood.

Aquatic Subtype

Creatures with the aquatic subtype always have swim speeds and thus can move in water without making Swim checks. An aquatic creature can breathe underwater. It cannot also breathe air unless it has the amphibious special quality.