Security Guard

If you would eliminate a player, FIRST reveal this
role if it's face-down. When revealed, choose
another player. If their role is already revealed, turn
it face-down. As long as this role is revealed the
most recently chosen player may not reveal their
role, is considered to be role-less, loses all role-related
abilities (including win conditions and loss
conditions). During your upkeep you may turn
this role face-down.

Win Condition: If all other players are eliminated.