Devil's board

You are participants of a city quest in the genre of a mystic thriller. The legend promised a game in the spirit of horror-reality: an abandoned orphanage, mysterious disappearances, occult symbols. The organizers assured: everything is under control, everything is a game. But the deeper you entered the building, the more it seemed that something went wrong. The orphanage "Northern Lights" was closed more than forty years ago after an investigation into disappearances of which no one was found guilty. According to unconfirmed rumors, a secret cult operated in the basement, sacrificing children in the name of an unknown force. The only surviving girl, Elya, spent many years drawing a board with letters and eyes until she was found dead in a psychiatric hospital ward. They say, if you find this board, you can hear the voices of those who have not left the shelter. You wanted to unravel this mystery. But now it's unraveling you. This is not a game. This is the "Devil's Board".