Crossbreed Priscilla
Crossbreed Priscilla is one of the optional bosses you can encounter in the game. She is located in the Painted World of Ariamis.
Note: If you cut off Priscilla's tail you will receive Priscilla's dagger, which is a rare weapon that causes massive amounts of bleeding.
Priscilla will not immediately engage the player in combat, but will instead plead the chosen undead to return home and leave her world, instructing the player to leap off of the plank behind her. Approaching the plank will trigger a cutscene that sends the player back out through the painting. The player can freely leave that world behind and continue on their adventures, or travel back into the painting and hunt down Priscilla once again.
Priscilla will turn hostile once damage is inflicted upon her. Upon engaging her she will turn invisible. You can get a jump her and get her special tail dagger before the fight by targeting her tail and cutting it off while she continues to talk. Be sure to take note of where her foot prints are as well as the direction, if you circle around to either side of her feet you can get an easy 1 to 2 hits after she attacks (she takes a step forward to attack). Attacking her a few times like this will cause her to turn visible.
During her initial invisibility phase, Priscilla is limited to one combination attack: A powerful forward crosscut followed by a lighter second swing. The first cut will dig deeply into your stamina bar and add a good chunk of bleed damage even while blocking, if the bleed bar fills you'll suffer instant death. Quickly land a few hits with your melee weapon and roll away, you want time to rest between hits so your stamina and bleed bar stay within safe levels. Be sure to stay on the portion of the platform covered in snow, as to be able to see her footprints, and brace for another combo. After a few of these exchanges (as little as one or two, depending on your melee damage) Priscilla will become both visible and target-able, triggering Phase 2.
In Phase 2 Priscilla's ability list changes slightly, but becomes considerably easier to deal with. Priscilla retains her powerful crosscut, but abandons the follow-up blow. She also gains a new ability, an arctic breath, that she employs when the player is at range. Priscilla rotates as she uses this ability, and covers about 180 degrees of the platform, following the players movement. The chilled air from the breath lingers for a few moments after the attack has ended, and is still harmful, so it is suggested that the player avoid the affected areas completely until the effect dissipates.
After a set period of time (not health percentage) Priscilla will trigger a snowstorm and turn invisible once again, cycling back to phase one. It is entirely possible to kill Priscilla before she ever returns to Phase 1, assuming you're doing respectable damage. If she does return, however, remain vigilant - as it's easy to be lulled into a false sense of security from the simplicity of Phase 2. Her attacks are hard to judge while she can't be seen, and you will want to make sure you're at full health at all times during Phase 1 to avoid being surprised.
A quick way to end this battle is with pyromancy. At the start of the battle when she walks towards you, hurl a nice fire orb her way which will bring her out of her invisibility, allowing you to lock on to her. Lock on and strafe around her keeping a safe distance from her blade and blizzard attack and unload whatever fire attacks you have. She is very weak against fire and will drop in no time.
Another tactic is to use throwing knives. Not for damage, but to stagger her out of her invisibility. It takes some time to get good at aiming your shots, but when you do, it makes cutting her tail off much easier. Be sure to stock up on them before entering the painting. They can be purchased from the undead merchant (male) in the undead burg. They are also dropped by the painting guardians just outside the portrait.
This cycle repeats until her health is depleted, and the player receives 30,000 souls as well as the "Soul of Priscilla", which can either be consumed for 40,000 souls or used to craft the "Lifehunter Scythe". The Scythe is a slashing-style Halberd that inflicts 165 physical and 500 evil damage, and has respectable scaling grades - making this a powerful weapon. (Warning, this weapon will inflict heavy damage on YOU if used too many times in a row.)
Note: if player plans on engaging Crossbreed Priscilla in a battle it is recommended that the player starts the battle by using the Pyromancer Toxic Mist or Poison Mist as these cause an aura around Priscilla making her easy to spot during the fight. Although it wont allow lock on it will make it considerably easy to know where to attack.