Glacial Retribution

When targeted by an attack, you conjure ice helictites that hinder the attacker. The target must make a Dexterity saving throw. On a failure, if you’re struck, you take only half the damage and the attacker takes 2d8 cold damage. On a success, the attacker takes only half the damage.

At Higher Levels. When you cast this spell by spending Mana points equal to a 2nd-level spell or higher, the cold damage increases by 1d8 for each spell level above 1st. When cast as a 5th-level spell or higher, the damage becomes glacial.