Twist Fate

You attempt to twist fate to protect a creature. Make a Constitution saving throw, on a success the target takes no damage as the object or effect that struck it is inexplicably avoided, on a failure the target takes half damage instead. The DC equals 10 or half the damage the target took, whichever is higher.

At higher levels. When you cast this spell using a spell slot of 4th level or higher, the DC is reduced by 10 for each slot level above 3rd.