If a space is Difficult Terrain, every foot of movement in that space costs 1 extra foot. For example, moving 5 feet through Difficult Terrain costs 10 feet of movement. Difficult Terrain isn't cumulative; either a space is Difficult Terrain or it isn't. A space is Difficult Terrain if the space contains any of the following or something similar: 1. A creature that isn't Tiny or your ally 2. Furniture that is sized for creatures of your size or larger 3. Heavy snow, ice, rubble, or undergrowth 4. Liquid that's between shin- and waist-deep 5. A narrow opening sized for a creature one size smaller than you 6. A slope of 20 degrees or more