Blaze of the Gods

You swirl you hands into a variety of different symbols, and you whisper strange words. You point to a space, and the area becomes engulfed by flames and counts as difficult terrain. No spell, curse, or blessing other than the spells, curses, and blessings from Gods can put out the fires. All objects not being worn or carried within the 60 foot radius sphere disintegrates into ash. The fires can't be put out by any non-magical means. All creatures that start, take and action, take a bonus action, or end their turn in the area take 9d12 fire damage. This fire damage ignores resistance and immunity. When a creature leaves the area, a the fire bursts in their direction, and they take 12d12 damage and their speed becomes 5 feet until the next round. They also can't take reactions or cast spells until the next round. You can dismiss the fire as a bonus action, and the fire can't effect you or your companions. In addition, you and your allies can cast all evocation cantrips at will for the duration, and if the fires are put out by godly means, the spell stays in place and you can still cast all evocation cantrips at will, but your companions lose the ability to do so. Once you move 500 feet away from the area you chose, the spell ends. While the spell remains in effect and the fires aren't put out,  you can cast Fireball three times at will.