Tivaryn's White Nova

Summon a ball of white energy in your hand. It lights up 100 square feet. It can be thrown to anywhere in sight exploding into a dome 100 feet in diameter and dealing 8d12 of fire damage. It can be thrown and turned into a beam of white energy that travels infinitely breaking anything unless otherwise noted, it deals the same damage. It can be thrown as a spear dealing instant death.