AG's Boon of the Warding Flame

You have immunity to Fire damage. Additionally, if you would take more than 25 fire damage from any single source, you become wreathed in flames until the end of your next turn.  While you are wreathed in these flames you gain the following traits.

• Allies including yourself deal an additional 1d6 fire damage with weapon attacks that hit within 15ft of you.
• When an enemy within 15ft attacks someone other than you, your flames lash out at them, dealing 2d6 fire damage.
• You must use your bonus action to maintain this effect, and it cannot be activated again for 5 minutes once deactivated. The effect ends automatically after 1 minute.