Dark Sun

You hold out your hand with your palm pointed toward the sky. You then utter, "Tenebrae Ignis" and a ball of black, unholy fire emerges in your palm. Then, you throw the black flame ball at your enemy, dealing 8d4+16 fire damage and 4d6+12 psychic damage to said enemy. It leaves a 10 feet square area covered in black fire that deals 2d4 fire damage and 1d6 psychic damage to any creature standing in it. The inferno will continue burning for all conceivable time unless it is extinguished with holy water.
This spell cannot miss and cannot be saved against.