Although never named, The Guardian of Izanami’s house was a formidable opponent to Lucifer. He requests he play a game before Lucifer is allowed entry, That game is that you reach into a pot of boiling water and pull out a stone. The red stone grants entry, the white stone means instant death and the grey stone meaning madness.
Lucifer however simply throws the pot of water on the demon, reaches down and picks up the red stone and casually walks into The House of Windowless Rooms leaving The Guardian in pain.