Reena’s dust

Michael used a simple [Earth Wall] to defend against one of Reena's scimitar. Her sharp blades and quick turning momentum were able to tear through the wall quite easily, but this gave him enough time to dodge away from the five doves that pecked at his body.

A magic circle appeared in front of his palm, manifesting a fire ball upscaled to a 5th star spell. With a single thought, the fireball shot towards one of the birds that was swooping down towards him.

The ball and the bird met in the mid-air, creating a fiery explosion.

The fireball was able to successfully destroy the bird's body, turning it into nothing but dust. But despite getting hit by the magic spell head-on, the red dust remained completely unharmed. And just a few seconds later, the cloud of dust formed into another dove as if nothing ever happened.

As expected, it's not affected by normal spells. How about a spell that's abnormal?