Spell Aegis

This feat is created by Nedrapter for use in his Land of Arda campaigns, and are balanced to the hardcore nature of them. 

• when a non-abjuration spell that targets you and only you is cast, you can use your reaction to make an Arcana Check. If the result is higher than 10 + the spell's level, you choose to negate either the damage or the rest of the spell's effects. If the result is higher than 14 + the spell's level, you negate both. If the result is higher than 20 + the spell's level, you deflect the spell back at the caster.