Parasite
Team: Solo Killer
Aura: Unknown
Advanced role of Corruptor 
Ability
During the night, you may infect a player. You may infect another player even if you already have infected targets.
The following night, infected players are roleblocked and informed that their body has been taken over.
You may select one infected player and choose targets for their ability. The infected player will use their ability on those targets and die at the end of the night.
If the infected player has no usable ability, or their ability cannot be controlled, they instead infect the chosen target and die. (this does not bypass protection)
If multiple players are infected, you may only control one. All other infected players survive and the others are not infected anymore.
If you choose not to control anyone, the oldest infected player dies and all others are not infected anymore.
If a non-villager role (except Solo Voting roles) is infected, they simply die at the end of the following day instead.
Extras
Infected players are not informed until the night they are controlled.
Controlled abilities use the infected player's normal targets and limitations.
Players that die from infection are considered killed by the Parasite.
Motivation
I thought having a solo killer who could control targets would be quite cool, so this is the concept i got!
Parasite trades killing speed (literally takes 2 nights for selected target to die) with the fact that it can spread (or even better) use the targets ability on someone else!