This is a last resort spell that kills the user when the time is up, but for 1 minutes while using the spell you become the embodiment of fire
To activate the spell you form fists and slam them together (sparks fly from your hands), and then slam your fists into the ground (more sparks fly from your hands), then what looks to be a summoning circle made of liquid fire forms around you and then flows into you through your fists. Then your fists ignite and the fire spreads throughout your body forming a suit of armor that greatly resembles a dragon. Your body gets covered in semi-transparent scales of fire with horns growing from the head of the armor, and claws from the hands of it. The fire armor grows dragon wings from its back and a tail. (The user decides the design of the horns, wings, claws, tail, and scales).
While using the spell your armor class goes up to 28 your speed triples, your health goes back to full and doubles, your amount of actions per turn doubles, and you gain an immunity to fire and cold, and resistance to any none magical damage type until the spell ends. You gain the ability to fly as fast as triple your normal speed, your reach doubles, and you always have advantage to hit.
This spell allows you to do unarmed strikes that do 20d6 fire damage to the enemy that was directly hit and it does half as much damage to enemies within a 10 foot radius, and any water or ice based attack uses on you instantly vaporizes once it gets within 10 feet of you, causing no damage. Any non-magical magical weapons used on you melt or burn up when the attack is missed. When a melee attack is used on you the attacker must make a constitution saving throw of 20 and take 6d6 fire damage on a failed save and half as much damage on a successful save. Also you can only cast fire spells while using this spell, and the damage and range of any fire spells you use double.
When the spell ends your body burns up into ashes not allowing you to be revived (the user can describe their death but they can’t be revived)