Eight Trigrams Palm Rotation

You expel raw magic from your body and spin at an intense speed. Magic radiates from your body and forms a deflective barrier, a sphere with a 10ft radius centered on you. You gain a bonus +8 AC and you automatically succeed on all Dexterity and Constitution Saving Throws until the start of your next turn. If there are any creatures within the sphere, each creature must make a Strength saving throw. A creature takes 3d10 force damage, is pushed back 15ft away from you and knocked prone on a failed save, or half as much damage, is pushed back 5ft and is not knocked prone on a successful one.