Torahime will certainly appreciate getting her 19-20/x2 turned into a 17-20/x2, though, especially with the auto-confirm on critical hits. Anyway, I mentioned last night that I was going to present the stats of the Caligrosto demon for approval, so...
Caligrosto, CR 6
hp 68 (8 HD); Reflective DR 15/bludgeoning and piercing
CE Medium outsider (chaotic, evil, extraplanar, incorporeal, loumara)
Init +9; Senses darkvision 60 ft.; Listen +13, Spot +13
Languages Abyssal, Common; telepathy 100 ft.
AC 21, touch 21, flat-footed 16
(+5 Dex, +6 deflection)
Immune acid, electricity, fire, incorporeal traits
Resist cold 10; SR 17
Fort +10, Ref +11, Will +8
Speed 30 ft (18 squares), fly 60 ft. (perfect)
Melee +1 keen greatsword +15/+10 (2d6+12/17-20) or touch +13 (1d6 Str damage)
Space 5 ft.; Reach 5 ft.
Base Atk +8; Grp +8
Atk Options Combat Expertise, Improved Disarm
Special Actions possess lade
Abilities Str --, Dex 20, Con 18, Int 13, Wis 15, Cha 22
SQ fiendish shade, infuse weapon, invisibility, martial prowess
Feats Combat Expertise, Improved Disarm, Improved Initiative,Weapon Focus (greatsword)(B), Weapon Specialization (greatsword)(B)
Skills Bluff +17, Intimidate +19, Knowledge (local) +12, Knowledge (the planes) +12, Listen +13, Search +12, Sense Motive +13, Spot +13, Tumble +16
Possessions +1 keen greatsword
Possess Blade (Su) Unlike most loumaras, caligrostos cannot possess living creatures. Their ability to possess is limited to slashing weapons. A caligrosto may attempt to possess any unattended slashing weapon by taking a full-round action (this provokes an attack of opportunity). Against nonmagic weapons, a caligrosts is automatically successful. A magic weapon can make a DC 20 Will save (this save DC is Charisma-based) to resist the possession--if the object succeeds, the caligrosto may never again attempt to possess that particular bladed weapon. Once a caligrosto possesses a weapon, it may come and go as it pleases, taking a move action to enter and leave the blade.
While possessing a sword, the caligrosto is immobile and cannot take attack actions, nor can it be detected by most effects that detect creatures (such as see invisibility or locate creature). Detect chaos and detect evil reveal that the possessed weapon has that alignment, but not that a demon lurks inside. True seeing reveals the weapon to be seething with coils of what appears to be mist flecked with lightning. The caligrosto can still observe the world around it, but its ability to interact with the world is limited to telepathy.
A creature can wield a caligrosto-possessed weapon as if it were a normal weapon. Often, the caligrosts infuses the weapon (see below) to make it more appealing and more likely that it will be used in combat. It may even use telepathy to try to convince a creature that it is an intelligent weapon--in this case, the caligrosto tries to encourage its new "owner" to attack creatures capable of wielding weapons.
Once a caligrosto-possessed weapon strikes and creature that is capable of wielding it (regardless of the creature's size), the caligrosto can attempt to wrench free from its wielder's grasp and create a fiendish shade of that creature. A caligrosto often tries to convince its wielder telepathically that this is merely a short-lived but potent variant of the dancing quality, hoping to let its wielder allow the effect to occur without resisting. The wielder can attempt a DC 20 Will save to prevent a wielded caligrosto from flying out of her hands to utilize its fiendish shade ability. This save DC is Charisma-based.
Once a caligrosto gets free of its wielder and assumes a fiendish shade, it can remain in that mode eternally. Typically, a caligrosto helps its previous owner defeat the creature before turning on her in hopes of creating a fiendish shade of her, but something a caligrosto can't wait for treachery and attacks its previous wielder as soon as it escapes.
A caligrosto can be forced out of a weapon it is possessing by banishment, dismissal, dispel chaos, or dispel evil. When a caligrosto is driven out in this manner, the weapon it was possessing drops to the ground. The caligrosto can attempt to re-possess the weapon on its next action (although if the weapon is magical, it gains a new Will save to resist this new possession attempt as if the demon had never before attempted to possess it). If a caligrosto-possessed weapon is destroyed, the caligrosto is forced out of the weapon and must make a DC 20 Fortitude save to avoid being stunned for 1d3 rounds.
Strength Drain (Su) A caligrosto deals 1d6 points of Strength damage with its touch attack. Whenever it deals Strength damage to a target, a caligrosto heals 5 points of damage; if the demon is healthy, it instead gains this healing as temporary hit points.
Fiendish Shade (Su) As long as a caligrosto is wielding a weapon, it creates a phantom image of the last creature it damage, although this incorporeal image is of a fiendish incarnation of the creature duplicated. A caligrosto can only duplicate the image of a creature capable of wielding a slashing weapon, and it remains Medium size no matter what size the original creature was. Once a caligrosto has taken on the shade of an enemy in this manner, it gains a +2 insight bonus on attack rolls and weapon damage rolls made against that target.
Infuse Weapon (Su) A caligrosto can infuse a magic weapon it has possessed with the keen weapon quality. More powerful caligrostos can infuse additional weapon qualities into their blades. A caligrosto with at least 14 Hit Dice can infuse its weapon with the keen and wounding special qualities. The most powerful caligrostos (those with 20 or more Hit Dice) can infuse a possessed weapon with keen, wounding, and vorpal qualities. Infused weapon qualities stack with any existing weapon qualities a weapon may have, but not with weapon qualities of the same name. Thus, a 20-HD caligrosto that possesses a +3 unholy speed longsword would be able to infuse it into a +3 unholy speed keen wounding vorpal longsword.
Invisibility (Su) A caligrosto is invisible in its natural (nonshade) form when it isn't possessing a blade. This ability is constant, allowing the caligrosto to remain invisible even when attacking. This ability is inherent and not subject to the invisibility purge spell.
Martial Prowess (Ex) A caligrosto is uncannily adept at wielding bladed weapons. Once it has possessed a blade, it is treated as if proficient with that weapon, and as if it had Weapon Focus and Weapon Specialization with that weapon type. More powerful caligrostos gain additional bonus feats--a caligrosto with at least 12 Hit Dice also gains Greater Weapon Focus with its currently possessed weapon as a bonus feat. Finally, a caligrosto with at least 18 Hit Dice gains Greater Weapon Specialization with its currently possessed weapon as a bonus feat. Although caligrostos have no Strength score, they use their Dexterity modifier to modify their attack rolls with their possessed weapon, and modify damage with the weapon using their Charisma modifier (in the same manner that Strength adjusts damage with weapons).
Reflective Damage Reduction (Su) As long as a caligrosto's fiendish shade ability is in effect, it gains DR 15/bludgeoning and piercing. Slashing damage negated by this damage reduction is applied to the creature whose shape is currently being mocked by the loumara's fiendish shade ability. For example, if a caligrosto's fiendish shade is imitating Lidda, and Krusk strikes the demon with his +3 greataxe and causes 25 points of damage, 15 points of that damage are negated and applied to Lidda instead, while the caligrosto takes the 10 points of damage not negated by the damage reduction. Nonmagic weapons cannot harm the caligrosto (due to its incorporeal traits) and thus are not affected by this unusual defensive ability.
As I said last night, I'd like for Torahime to be able to summon 1d4 advanced 20 HD versions of these creatures (which would have enough hit dice to get the full effects of their Infuse Weapon and Martial Prowess abilities) and for Torahime's aspect to merely have a 50% chance to summon 1d4 regular Caligrostos. They'd show up with their Fiendish Shade ability active, and she'd largely use them for a combination of enhancing her own sword and as extra muscle in a fight.