Dragon's Maw

A large dragon's head and neck forged from the element tied to your draconic ancestry erupts from the ground and bites any target in it's 15 foot reach, dealing 3d10 piercing and elemental, draconic ancestry damage. A successful Bite attack restrains the target. The Dragon Maw may continue chewing an restrained target, or drop it and attack a new target each round as a bonus action. The Dragon Maw has as many HP as the caster. When the Maw's HP is reduced to 0, it erupts in a 20' burst dealing 3d10 draconic ancestry elemental damage to all creatures in the burst. You may move the Dragon Maw 20' each round. Restrained targets may make a strength ST vs the caster's spell DC to escape as an action each round.