Looking for a Story about Knights with magical powers fighting for their kingdom

The most I can remember is that there were a dark lord or something like it from another land that was threatening the kingdom.

A wise king decided to form an army of knight with magical powers. They started out with something between 5 and 10 knights each with their individual powers, strenght and weakness.

after some years the army was starting to grow as they recruited more people with magical affinity.

at some point, the Gods of this world even came in play to try and keep the balance between good and evil.

Thats all I can remember. Any hint would be greatly appreciated. I've read this about 8 years ago and it seemed pretty new. I'm pretty sure it was a serie of novel.