Pure artifact

Exploration Stage: Artifact Bank
From: Mr. Black
Description: If Broderick wanted to use the artifact, he would need a special solution to purify the energy of the artifact's previous owner. This is a common procedure in banks and I have had some experience with it. Help me find the solution!
Completed: Did you find the nullification solution issued in Broderick's name? My hunch was right. The man is trying to maximize the power of the artifact. Even if his intentions are correct, it is not the kind of power one man can handle. He is a danger to the city!