Corrupt by pleasure

Lara goes as usual for some tomb raiding when she suddenly finds a specific relic. She takes it back to the manor. But one thing that she doesn't know about it is that this relic specifically makes it's user (that is whoever took or touched it) corrupt day by day. Each day they get more frustrated about simple things until they all fully submerge to it. When they do, it's master is fully controlled by the relic. Like a brainwashing process. When they are controlled by the relic, they will to everything that it says, even if it means paving its way with blood of innocent people...