As a crawler, you have evolved a tough external carapace that shields your body. Your ac is 18, and cannot be decreased. However, you cannot wear any armour.

Being highly accustomed to the dark climes of the underland, crawlers have superior vision in darkness. You can see in dim light as if it were bright light, and in darkness as if it were dim light, up to a range of 120 feet.

As a crawleryou can use your sharp mandibles to bite into enemies, dealing 1d6 plus your strength modifier piercing damage.