Impenetrable Fog is a weather card that sets every non-hero Ranged Combat unit on both sides to 1 strength. Heroes ignore it, and Clear Weather cancels it.
It pairs well with Foltest: King of Temeria, the default Northern Realms leader, who can pull this card straight from your deck.
Three copies exist. Two are in the starter deck you get in White Orchard, and the third is a random reward for beating gwent players around the world. Since fog hits your own ranged row too, it works best in a deck that leans on Close Combat and Siege units.
