Become Fire

You become a burst of elemental flames. Until the start of your next turn, you gain the following benefits:
• You gain resistance to fire damage and to bludgeoning, piercing, and slashing damage from nonmagical attacks.
• You can move through the space of other creatures and ignore difficult terrain. The first time you enter another creature’s space on a turn, it takes 1d6 fire damage.
• Any time you are hit by a melee attack, the attacker takes 1d6 fire damage.
At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, it lasts for 1 additional round for each level above 2nd.