Novel info
Fairy Tail: Fairy's Blight

Aelius, an enigmatic mage, returns to Fairy Tail after four years on a century quest. With walls of isolation built around him, can the guild break through? As dark trials loom on the horizon, Aelius's power and past may hold the key to their survival or be their undoing.
The character's powers are loosely based on Nurgle from 40k, so plagues and poxes that's all you really need to know. Other than there are a few other OC's from 40k in this.
Fairy Tail: Fairy's Blight novel is a popular light novel covering Anime & comics genres. Written by the Author ArchonOfString . Read Fairy Tail: Fairy's Blight novel online for free.