The Hound Ending is an Ending in Prisoners of the Elder One. It occurs after failing to recite the Words of Power. Please see the entry on the Sorceress Ending for information on how to face The Elder One.
When Erik enters The Elder One's room, the God fucks him in the ass, turning him into a pallid woman, before taking her virginity. She attempts to recite the Words of Power, but fails, causing the Elder One to wipe her mind and transform her into a doggirl.