Become Fire

You become a burst of elemental flames. Until the start of your next turn, you gain the following benefits:

• You are resistant to fire damage and to bludgeoning, slashing, and piercing damage from nonmagical attacks.
• You can move through the space of other creatures and ignore difficult terrain. The first time you enter the space of another creature, it takes 1d6 fire damage.
• Once during your turn when you roll fire damage, you can maximize the value of one die of fire damage.

Source: Kibble's Casting Compendium