A heap of the dragon crab's treasure hoard collapses over one target within 120 feet that the dragon crab can see. The creature must succeed on a DC 15 Dexterity saving throw or take 10 (3d6) bludgeoning damage and be knocked prone and buried. The buried target is restrained and unable to breathe or stand up. The creature can take an action to make a DC 15 Strength check, ending the buried state on a success.