Dragon of Tortured Souls

     "A Lich places one gnarled hand on a Metallic dragon's gleaming white skull and begins to chant in a long-forgotten tongue. It's Phylactery suddenly appears over. the Dragons skull slowly spinning. as the Lich continues its chant the ground rumbles and the corpses of long dead men and women move towards the skull s if pulled by ropes and then contort and tear to form the body of a full-grown Dragon with the Liches Phylactery at its heart. Necrotic Smoke oozes out of the many skulls along its body including its main one and a Dark fire burn in its belly the faint glow barely visible through the mangled corpses."

     This Spell creates a Dragon undead construct using the corpses of the souls used to create and sustain the Phylactery of a Lich, the Phylactery itself, and the skull of a metallic Dragon. When cast the corpses knit together over the course of three rounds the lich can't take any other actions until the Dragon is constructed and must maintain concentration. If concentration is lost, then the corpses fall to the ground and skeletons are formed (two if disrupted on the first round, four on the second, and six on the third round). The Lich can, not try to cast the spell again until it finishes a long rest or adds another soul to the Phylactery (If the spell is cast again then the skeletons created are destroyed). When the Dragon is formed the lich maintains full control of it and it gains the stats of the Dragon of tortured souls.