Mystic Kinesis Art!
Boul Brimgan watched as his Minor Treasure of Kinesis Feline swallowed an Iron Grade Pranic Beast and shat out everything except its Spirit Container. Through the effects of Mystic Kinesis Art, the Kinesis Feline refined the Spirit Container to form an Elixir in its stomach.
The Elixir generated Prana through its body, and once its body was brimming with Prana, the excess amount flowed into Boul Brimgan. This way, he was able to recover Prana to upkeep his consumption.
He hadn't yet reached a level where his Prana generation surpassed his consumption, but once he has ten Kinesis Felines working for him, that would become a reality. He would have been stronger had he possessed a few more Minor Treasures, but unfortunately for him, they were all destroyed in the Sanctuary.