Thousand Waves

Zygarde releases a shock wave into the ground in front of it in a 100-foot by 5-foot line. Each creature of Zygarde's choice in that area must make a DC 15 Dexterity saving throw. On a failed save, a creature takes 27(6d6 + 6) bludgeoning damage on a failed save, or half as much damage on a successful one. The shock wave deals 40 thunder damage to all structures in contact with the ground in the area. If a creature is near a structure that collapses, the creature might be buried; a creature within half the distance of the structure's height must make a DC 18 Dexterity saving throw. On a failed save, the creature takes 17 (5d6) bludgeoning damage, is knocked prone, and is trapped in the rubble. A trapped creature is restrained, requiring a successful DC 20 Strength (Athletics) check as an action to escape. Another creature within 5 feet of the buried creature can use its action to clear rubble and grant advantage on the check. If three creatures use their actions in this way, the check is an automatic success. On a successful save, the creature takes half as much damage and doesn't fall prone or become trapped