Pool of Power

From power hungry also inheritance, that lead to bloodshed. The blood filled a pool in the mansion, and create an anomaly. The pool didn’t show any power or strange energy to anyone who didn’t desire power at all (it appear as a normal empty pool). Anyone who desired power must sacrifice something to fill the pool, until the pool satisfied, and then they became the resident of the mansion. All the resident were immortal, and able to regrow their body parts or reborn (if completely destroyed). People who become a resident, the memory about them would turn into false memory (others thought he/she already a resident since long time ago). Their power hungry wouldn’t stop, they even fight among themselves for eternity for power struggle, became the leader of the resident until he/she’s defeated by another resident. Until this day, the pool still exist.