Uwee hee hee! What have we here? I’m warning you, I’m armed… Eight-armed, that is! Uwee hee hee!
Ultros [River] (CR 4)
CN Large Magical Beast (Aquatic, Boss)
Init: +7; Senses Darkvision 90 ft., low-light vision; Perception +12
AC 20, touch 12, flat-footed 17 (+3 Dex, +8 natural, -1 size)
hp 126  (6d10+30)
Fort +10, Ref +8, Will +5
Absorb Water; Resist Ice 10;
Weakness fire, lightning
Speed 40 ft., Swim 60 ft., jet 250 ft.
Melee Bite +10 (1d8+5), 4 Tentacles +8 (1d6+2 plus grab)
Space 10 ft.; Reach 10 ft. (20 ft. with tentacles)
Special Attacks Acid Droplet, Constrict (1d6+2), Ink
Burst Mode Tentacle Frenzy
Str 20, Dex 16, Con 20, Int 16, Wis 16, Cha 6
Base Atk +6; CMB +12 (+16 grapple); CMD 25 (can’t be tripped)
Feats Combat Reflexes, Improved Initiative, Multiattack
Skills Acrobatics +12, Climb +14, Knowledge (local) +9, Perception +12, Swim +14
Languages Common, + three more
Tentacle Frenzy (Ex)
This Burst Break allows Ultros to gain an additional tentacle attack plus an additional tentacle attack for every four HD. These additional attacks do not require a full-attack action to use. This limit break lasts for a duration of 1 round + 1 round for every four HD. This limit break requires only a swift action.
Acid Droplet (Su)
Once every 1d2 rounds, Ultros can drench a single enemy with acid water within 30 feet for 4d6 points of water damage and is inflicted with the Poison status effect for 1d4 rounds unless they make a Fortitude save (DC 16) to negate the status effect. Blue mages may learn this ability as a 2nd level spell (Knowledge: Arcana DC 19).
Once every 1d4 rounds as a standard action, Ultros can shot out a blob of ink towards a target within 60 ft. If he hits (+8), the target must make a Fort save (DC 18) or has the blind status effect for 1d4+3 rounds.
Ultros can jet in a straight line as a full-round action. It does not provoke attacks of opportunity while jetting.