Obstacles

Seberus was absolutely gobsmacked to learn that all 5000 of Michael's allies had the same impenetrable shield as him.

After all, the Absolute Unity Defense that Michael had was something that could defend against any and all kinds of spells.

No matter what element it was, as long as it was not stronger than the wielder of the defense, then they wouldn't be affected by any spell.

"Yeah they have it," Michael said matter-of-factly. "But theirs is called the Lesser Unity Defense. It's a bit worse than mine. Since I'm a 4-star mage, any 4-star and below magic spell would not do anything to me. But for them, if they're a 4-star mage, then they can only protect themselves from spells that are 3-star and below." 

Michael explained it with a bit of a disappointed tone in his voice, as if it wasn't already one of the most powerful defenses in this world.