Witchstone Ring

While attuned to this ring once a day when you cast a spell you may use this ring to make the power level of the spell two levels higher than the spell slot used to cast it. You then suffer 2 points of exhaustion.
Witchstones are powerful and untamed magic, maybe one day we will learn all it's secrets. But I suspect that day is long off. - Worgan Wyrmcaller