Force Embodiment is an action done through anger and hatred with the Force. It is a rare ability some come to learn or are gifted with. It is highly difficult to learn but when gifted with the ability, it takes a little less time to master.
With the Force, the user would cover their body in the darkness of the force. They immediately turn into a being of shadowy black. The ability enhances the strength, speed, and force attunement for the user, making the force abilities used twice as strong. They become resistant to blaster bolts and common force abilities. Though not impervious. Most commonly the user has to be enraged completely and feel it develop within themselves. It takes the majority if not all focus of the user if they are not at the level of a Lord. Acolytes would rarely see this come out in combat, though it is not impossible, their limitations would include only being able to wield it for a short burst and right after the use it they would grow too fatigued to use this ability again for the day. At the level of the champion, the user would be able to focus on the ability enough to defend themselves from on coming attacks. They would only be able to continue to use it for one posting round. Should this ability be mastered by a Lord, the user would be able to willingly go into this form as they pleased with low concentration and fight fairly well while using other force abilities. They can use the ability for a total of three posting rounds though they would feel their stamina draining progressively the longer they wield the power. Councilor and Emperor/Empress status users would be able to use it easily and for however long they please as it would drain very little of their stamina. The effectiveness of the ability does not change through the level of ranks, but the length of usage for the user would vary based on their power levels. If the user was born with the gift of this ability, as opposed to trying to learn it, the wielder would come to master the ability at a younger age and lower level, thus meaning the abilities of the average Lord would be the abilities of the gifted Sith born with it at a Champion's level. This 'head start' would only become possible through training with a master or with another form of guidance such as holocrons, and ancient texts.
This ability is essentially the force giving the user the strength, speed, and attunement/control of the force from previous Darths and various other dead Sith. It has long term effects on the user, as every time it is used, the force chips away the personality and the individualism of the user themselves. Thus making this ability dangerous, though when used at higher ranked power it can be avoided easier than when an Acolyte loses their cool and goes berserk. They would suffer more if they continued to use it.
Should it be used longer than manageable as stated above, the force user would become too fatigued to continue combat. Also the user at lower levels have less control over the ability, as the dark side of the force would influence their mind.
To make a cool, edgy ability for my Sith. It is to give Sora- er I mean Soren his own ability!