Demon-Witches are the hybrid children of a witch and a demon. Only one of these hybrids is known to have existed, the unborn son of Phoebe Halliwell and Cole Turner. However, the child was never born, as it was vanquished along with the Seer when his power overwhelmed her.
Due to Cole being possessed by the essence of the Source of All Evil and Phoebe being one of the Charmed Ones, their union created a massive concentration of power. Even as a fetus, the child displayed incredible power, being able to vanquish a demon believed to be indestructible using an advanced version of fire throwing. However, as the child perished before his birth, his full powers were never revealed.