He immediately went to his mind and looked at the plant to see what happened to the core. The core was completely gone and the plant had grown an entire foot. It grew multiple branches and leaves, looking like a properly fed plant now.
He smiled. This growth was what he was hoping for because of the core and he got it. The leaves were worth a lot more than any normal 4th Circle Beast Core would sell for. It would accelerate his growth a lot more.
He went back to the world and opened his eyes. Now that he knew that the Beast Core did what it was supposed to do, he went back to practicing. He still had to perfect his techniques and spells. Only then could he increase his power properly.