Burrow

A burrow speed allows you to move through soil, sand, loose earth, and similar loose or soft materials as easily as walking on the surface. You move at your full burrow speed through such materials.

While burrowing, you cannot see or be seen (you have total cover and total concealment from creatures on the surface or in the air). You leave a tunnel behind you that remains passable for creatures of your size or smaller, unless the material is particularly loose (sand, gravel), in which case the tunnel collapses behind you.

You cannot end your movement inside solid earth — you must emerge to a surface or an open space (such as a natural cavern) by the end of your turn. If you are somehow trapped in solid earth (e.g. by a spell ending while underground), you are shunted to the nearest open space and take medium damage.

A burrow speed does not allow you to move through solid stone, metal, or worked materials. For that, see Earth Glide.

You do not need to breathe while burrowing (the magic or physiology that grants burrowing also provides air), but you cannot remain underground indefinitely — you must surface at least briefly each minute.