A large 20 foot diameter tornado of blake raging fire burns from a space within 120 feet of the caster. Each creature that the tornado touches forces them to make a STR saving throw or take full 10d6 fire damage and be sucked into the tornado, taking an additional 5d6 fire damage at the start of their turn. At the end of the creatures turn they can make another STR saving throw to force themself out of the tornado. A maximum of three medium or smaller creatures can be trapped within the tornado at any time. Large creatures have advantage on the saving throw (only two large creatures can be in the tornado), and creatures Huge and larger cannot be sucked into the tornado. 

If the maximum amount of creatures are already inside the tornado, and another creature fails the save, it is instead pushed 20 feet back, or until it cannot be pushed back farther. 

On a bonus action you can move the tornado up to 30 feet to hit more enemies, and if a creature inside of the tornado cannot be moved than it simply falls from the tornado and is knocked prone. 

If a creature dies within the tornado, everything but any magic items are burned to ash. While inside the tornado, the creature's only action can be to try and free itself from the spell.