Taldaline's White Dwarf

When you see a source unleashing fire against you or your allies, you attempt to contain that energy for yourself. You prevent 4d10 fire damage and capture that energy in small orb of white energy in your hand. On your next turn, you may throw this ball of energy out up to 60 feet where it explodes in a 10 foot radius sphere. Creatures within that area must make a dexterity saving throw or take damage equal to the damage prevented, or half as much on a successful save.

If you do not throw out the orb of energy on your next turn, the energy harmlessly disperses. 

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, you prevent an additional 1d10 fire damage.