Aegis of Aurea (1.0)

You bestow yourself a golden aegis, which absorbs damage for you. This aegis manifests as an invisible ward around you, which lasts for the duration. The ward has 20 maximum hit point. Whenever you take damage, the ward takes the damage instead. If the ward is reduced to 0 hit points, the spell ends and you take any remaining damage.

When the spell ends, the ward immediately explodes in a wave of magical energy away from you. Each hostile creature within 20 feet of you takes force damage equal to the ward's maximum hit points. Each target must also succeed on a Strength saving throw or be pushed away from you up to a number of feet equal to the ward's maximum hit points. 

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the ward's maximum hit points increases by 5 for each slot level above 4th.