Overchannel

You've learned to amplify the raw energy in your magics. Whenever you make a ranged spell attack, you may take a -5 penalty to the attack roll to gain a +10 bonus to the damage roll. This effect applies only once per turn. (I.e., at 5th level, a Firebolt will deal 2d10+10 if you hit, but only one blast from Eldritch Blast will gain the boost in damage.)