A Nexus is a place equi-distant from the five elements as explained in the TV series Charmed. Using this as a point of reference, it is quite possible that there could be several Nexus points of power scattered throughout the world, though rare. The one used by the Halliwell family in the Charmed series is embodied as a shadow and seen as a place of ultimate power. Phoebe Halliwell and Wyatt Halliwell, the only two people to be born in Halliwell Manor, were both strongly influenced by evil, with Phoebe becoming Queen of the Underworld and Wyatt becoming a concentrated source of evil power, enslaving California in an alternate future.The Nexus is located in the basement of the Halliwell Manor and various demons tried to steal its power, including Cole Turner and Zankou. Each attempt is thwarted by the Charmed Ones, and it is eventually destroyed at the end of season 7.