Counterstrike

When a creature successfully hits you with a melee or touch attack, but before you receive damage, you roll 1d10 + your spell casting modifier. The damage the creature deals to you is reduced by this amount, and you deal that amount in force damage to the creature. 

At Higher Levels. When you cast this spell at a level higher than 1st, you roll an additional 1d10 per level above 1st to deal/prevent damage.