She transform right in front of your eyes in something you did not think of. As she turns in gaze on your party, everyone draws their weapons.
Siren (FFV) [Undead] (CR 4)
NE Medium Undead (Boss)
Init +7; Senses Darkvision 60 ft., low-light vision; Perception +10
Aura Black Aura
AC 18, touch 13, flat-footed 15 (+3 Dex, +4 natural, +1 Armor)
hp 84  (5d8+20)
Fort +4; Ref +4; Will +6
DR 5/-; Immunity Undead Traits
Speed 30 ft.
Melee 2 Claws +9 (1d8+5) or Quarterstaff +8 (1d6+7)
Ranged Shadow Power Staff +6 (1d6)
Special Attacks Venomous Clasp
Burst Mode Bloodstrikes
Str 20, Dex 16, Con -, Int 14, Wis 14, Cha 16
Base Atk +3; CMB +8; CMD 21
Feats Improved Natural Attack (Claw), Toughness, Weapon Focus (Claw)
Skills Climb +13, Intimidate +11, Knowledge (Arcana, Religion) +10, Perception +10, Sense Motive +10
Languages Common, Draconic, Elvaan, Moogle + 2 more
SQ Hume Transform
Gear +1 bracers of armor, cure potion (1), Power Staff: Shadow, Quarterstaff
This Burst Mode allows Siren to gain an additional attack with her claw attack using the highest base attack bonus at -3. These additional attacks do not require a full-attack action to use and drain the total damage as health to Siren. This burst mode lasts for a duration of 1 round. This limit break requires only a swift action.
Black Aura (Su)
All creatures within a 10 ft. radius of Siren take 2 points of shadow damage per round. When struck in melee, all adjacent creatures, as well as the one who struck him, take 1d4 shadow damage.
Critical Attack (Ex)
Once every 1d3 rounds as a standard action, Siren can inflict more pain than normal. If she succeed at hitting with her claw attack, the damage is 1d6+5 x 1.5 for total damage.
Hume Transform (Su)
Once every 1d2+1 rounds as an immediate action, Siren can convert herself over as a hume being with completely different stats and abilities. She retains her new health bar for her hume form however she retains any damage taken in her undead form when she converts back over.
Venomous Clasp (Ex)
Once every 1d4 rounds as a standard action, Siren strikes her opponent with her poisonous claw. If she hits (+9), the target takes 2d6+5 damage and must make a Fortitude save (DC 15) or takes the poison status effect.