When a player reveals a guide, they keep that card.
Foils are maps. When a player reveals a map, they keep that card. Players can use maps to peek at one of the cards on the table before choosing a card to reveal. The map is then put back onto the table face down, the cards are randomized, and play continues. (Foil uncommons, rares, and mythics can be used as either a map or a guide!)
The basic land is the location of the ruins. When a player reveals the land, if they have no guides, they are killed by the Roil and eliminated from the game. If that player has one guide, they survive. In either case, the ruins (and the guide) are put back onto the table face down, the cards are randomized, and play continues.
TO WIN:
The first player to collect two guides and find the ruins—or the last player standing—wins!