Based on The Wheels from the Ezekiel. basically they are depictions on what angels look like.
Mobs: The Wheel, The Big Wheel
Mob Info: The Wheel has 400hp deal a lot of damage in a close distance, The Big Wheel has 800hp and can attack from a range(does not shot projectiles).
Video Showcase: https://www.youtube.com/watch?v=e2bKg08g1ZI
The Reason on why this mod took so short and is on 1.12.2 was because both the model and texture was originally made for 1.12.2. expect bugs :(