The spell interposes a ward between you and the incoming energy, potentially nullifying its effect on you. You gain a +3 bonus to all saving throws involving the triggering effect - acid, cold, fire, lightning, or thunder, until the start of your next turn, including the triggering effect. Also until the start of your next turn, if you are subjected to an effect involving the triggering damage type that allows you to make a saving throw to take only half damage, you instead take no damage if you succeed on the saving throw, and only half damage if you fail.

For the duration of the spell, every time you are subjected to an effect listed above, the bonus provided by the ward is reduced by 1. If the bonus would reach 0, the ward dissipates, and the spell ends.