Mythos cards drive the horrors of each game. You will grow to hate them. Half the Mythos cards in a game come from the Episode box and the other half comes from the Elder One box. Each turn, after taking their actions, the active player will draw a Mythos card. Some will move and/or summon enemies. Others will drive you mad. There are also ones that aren’t as kind.

Most Mythos cards have an Elder One Summoning symbol on them. When there are 3 Summoning symbols in the Mythos discard pile, the Elder One advances along the Summoning track.