Role idea: Evocationer

I had this idea, wich I thought would make the game a bit more interesting and keep people in the game after they die.

I'm also not entirely sure wether the name is correct, but I figured I'd need to think of one anyway before submitting it, it could always be changed.

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Role: Evocationer "A magic user that will allow the dead to take their revenge"

Alignment: Town Killing

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Abilities:

• Select one dead town member to exert revenge during the day
• The dead town member will haunt a target of their choosing the following night, killing them and ignoring night immunity.
• If the target is healed, they will survive.
• Bodyguards do not protect from it.

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Special Attributes:

• None

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Goal: Lynch every criminal and evildoer
You win with: The Town and Survivors.
You do not win with: The Mafia, Witches, Werewolves, Serial Killers, Arsonists.

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Notes:

• You may only use your ability twice.
• You may not use your ability twice on the same person.

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About the haunt:

• During the start of the day, it will show up as "Was haunted by a dead town member."

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When investigated:

• Investigator: Your target seeks Justice, they may be either a Sherrif, Retributionist, Executioner or Evocationer.

• Consigliere: Your target is able to summon ghosts, they must be a Evocationer.

• Sheriff: Your target is not suspicious

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Final Thoughts
It was just a random idea that popped up in my mind and it might need tweaking to not make it overpowered, but I didn't think it was too bad of an idea. It will encourage town to stay in the game after they die and thus will make other roles more effective as well. (I'm looking at you, medium.)

I think it should possibly be unique, but I'm not quite sure, please give me your opinions on that.