Whenever you start casting a spell using mana that is either from the Fire theme or deals fire damage, you are wreathed in a mantle of flame until the start of your next turn, gaining the following benefits:

• You shed bright light in a 5-meter radius and dim light for an additional 5 meters.
• Any creature that touches you or hits you with a melee attack while within 1 meter of you takes fire damage equal to your level + your spellcasting ability.