Reckless Caster

You’ve experimented with power that exceeds the bounds of safety, granting you the following benefits:

Ability Score Increase. Increase your Intelligence, Wisdom, or Charisma score by 1, to a maximum of 20.

Arcane Gamble. By using additional spell slots (Max of 2) of the same level as the original spell level, You may cast a spell as if it were cast at a level higher. On a critical fail the spell explodes before it can be cast in an area 10ft. of the caster, dealing 3d6 of the corresponding spell damage. (Spells that have no damage type i.e. healing spells default to force damage.)