Elder Rune of Fire
Bane Effect:
The target must make a Dexterity saving throw, taking 10d10 fire damage on a failed save, or half as much damage on a successful save.
Boon Effect:
The target gains a pool of ten d6s. Up to two of these dice can be expended at a time and added to any damage roll the target makes when it hits with a weapon attack. The damage added by these dice is fire damage.