Kalphite Nest

Kalphite Nests spawn rarely in any patch of sand, although they can be found more commonly in desert biomes. Note that the nests can spawn at any level, including underground, and not just on the surface. If a player walks into or over a nest, they will be hit for rapid damage as they are attacked by kalphite beetles. The block does not need a particular tool to break, but takes a long time to destroy. Kalphite beetles are dropped when a kalphite nest is destroyed, at between 1 and 5 per nest.