The function of both arrays was actually not too complicated, but the complexity that allowed them to achieve the feats they strived for was too much for any common man.
When they activated, two things happened simultaneously.
Firstly, the central area of the dragon kingdom was enveloped in a crimson-red haze. Energy filled the air and infested everyone the spell targeted.
Specifically, the common populace of Arulion.
Their bodies bulged as new muscles formed where they were needed. Their blood screamed out as it underwent a massive change.
The array's functions dug deep into the ancestry of the common people and drew out the blood of their nearest possible Divine ancestor.
All of today's dragons existed because of a select group of no more than fifty. If their ancestry was traced back far enough, one would be able to find the bloodlines that had been lost through eons of dilution.