Flame Rush

Your body is infused with elemental fire, barely constrained by your mortal nature. You gain the following benefits: Whenever you take the Disengage action on your turn, you can choose to turn to flame for the duration of your movement. During this movement, you can pass through another creature's space and deal fire damage to them equal to your proficiency bonus. You may only deal this damage to a creature once per turn, and you may not end your movement in an occupied space. As a bonus action, you can make a special unarmed attack with a free hand. This attack deals 1d10 fire damage on a hit. This effect’s damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).