Primal Spark

+1 to spell attack and damage rolls and save DC
Once per short rest, you may increase the bonus
to +3 and change the damage type of a spell to
cold, fire, lightning, or force. Roll on the Wild
Magic Surge table with 100: explosion of 2d6
damage each type in a 15 ft radius.
Trapped in a magic sphere by an ancient sorcerer, this primordial elemental essence is as unpredictable as it is powerful.