"Scouting" is the most dangerous card, I just died instantly from 8 monsters, lol. It needs to be used with the monster revealing card, then used to reveal all the other item and exit cards.
Yes, it's dangerous. But there is a card that turns all monsters face down. Or a character's skill. Or try clicking on the open noise trap if it open with all cards (this is still a hidden mechanic, I'm not sure if someone used it :))
