The void's 1st mage

Kairav one day finds himself in another world, born again. How ever it seems something is missing as during the status confirmation ceremony when he turned 5 his soul was found to be a 1. Stumping the priests how he was even alive, more or less sentient.

Will Magic be forever barred for him or will his odd soul be the key to this weird quest in his logg?

"Defend the relm from the void"