Bolt Contradiction

The caster forces together to powers at primordial opposites, creating a violent torrent before forcing it on a target. The caster makes a ranged attack roll on a target within site and range. On a hit, the target takes 1d4 force damage + 2d10 damage, this second type of damage is determined by the roll of the d4. On an odd roll the damage is radiant and on an even roll the damage is necrotic. Any spell slot used past the first increases the damage chosen at random by an additional d10. If a spell slot of 3rd or higher is used for this spell, the target must succeed on a strength saving throw, or be pushed back 10 feet. On a passed save, the target is not pushed back.