User blog comment:The Dark-Eyed One/Conceptual game elements - up for discussion!/@comment-16533050-20160720195120

For those who read my fanfics, this contains some as yet unrevealed SPOILERS for characters within:

One of my antagonists, nicknamed The Beast of Whitecliff is one of the Marked and was originally supposed to resemble Radu from the cheesy Sub-Species vampire movie franchise of the early 1990s, imbuing his shadow with his essence and traveling about like that. However, with Shadow-form being one of Emily's powers I scrapped that, and did something else. Here is a list of his powers:

Form Change: the Beast undergoes a transformation from a member of high society to a ghastly, beastly form - feral, monstrous and powerful. It's basically a Jekyll/Hyde transformation ability that he can control.

It imbues him with additional strength and resistance when used, like the Vitality, Agility, and Blood Thirsty passive abilities, and also nicely disguises his features, allowing him to go out with a handy built-in 'mask' when needed.

Summon Fog: this ability has been mentioned before, but his works more akin to that presented by Granny Rags in her final confrontation with Corvo. It does distort sound and such making it more difficult to find him.

Fog Tendril: in essence, a 'Tier 2' level of the Fog ability. Through his own fog or one that already exists, the Beast can send out a tendril of fog, insubstantial and snaking along outside of the main body of the fog. Through this tendril, he can actually 'see' the surrounding area in a sense, even using such abilities as Dark Vision through it.

Characters can be 'touched' by it, but will not notice anything more than a dark chill (the equivalent of one pair of the arrows above their heads). The Beast can't do more than look with it, so it makes a nice scouting mechanism.

Enhanced Dark Vision: due to the nature of the Beast, his Dark Vision highlights not only live creatures but the purity of their essence. Innocents and those 'pure' in spirit radiate a brighter, more golden tone, while villains or those of a dubious nature radiate more in the darker tones of red.

Spirit Theft: based off of a concept of Piero's Spiritual Remedy. While in his monstrous guise, the Beast can attack others with a bite, feeding on them like a vampire while 'stealing' or 'leeching' away their spirit.

Through this ability he is able to not only regain his power (in game terms think refilling the mana bar) but can also use the power gained to further his own abilities, increasing them thusly instead of using runes (though he can still collect runes as well). It also has the side-effect of retarding the aging process (but not negating it entirely).

This power is dependent on how 'bright' the spirit of his victim is; the more pure she is the more essence/spirit he can drain from her, and the more he can advance his power.

Another character in a different fic has a Life Leech power very similar to this, in which he can drain the health from someone when in physical contact with them (and in game terms, refilling his own). It works similar to Pull (basically through the palm of his left hand rather than biting them, and like Spirit Theft, use of this ability retains his youth.

The Beast also has an equivalent of the Blink power (he disperses into mist), but that works similar to the Basic ability, and also has the Scream effect that the Brigmore Witches had (his jaw distends like a snake's when he uses this ability).

Forgot one:

Shadow Creation: the Beast can create small items of a solid nature from shadow stuff. Usually he creates a swordblade and pommel, but can create other smaller items such as a simple key. In game terms this would work on simple lock mechanisms, but he cannot form something complex like a lock requiring a special key; this is similar to how Windblast only works on certain doors. The items stay in existence only as long as he holds onto them, and dissipate quickly, so he can't create arrows, or other missile weapons from them.