The priest plays in the innocent team and his role is hidden like most other roles too. He has one very powerful tool: the holy deagle. With the use of said tool, he can create a powerful brotherhood of innocent players. Players inside the brotherhood see each other in the scoreboard. But he has to be careful, there are a few things to keep in mind:
most innocent players are added to the brotherhood, except detectives and sniffers since it is too easy to confirm them
shooting a detective or sniffer with the holy deagle deals 30 damage to them
shooting an infected host or necromancer kills the infected host or necromancer, the same goes for sidekicks
shooting other evil roles kills the priest
shooting a marker will mark the whole brotherhood
if the priest is converted to an infected, zombie (necromancer) or sidekick, all other members of the brotherhood are converted too
while only innocent players can join the brotherhood, players stay in the brotherhood even if they are converted (e.g. jackal, unknown, ...)
Additionally the holy deagle has a cooldown after being used. The cooldown is short by default if you missed the target but a higher cooldown is used if you added a player to the brotherhood
