Helsinker

Helsinker: noun. This term originates from the now largely forgotten myth/legend of when the god Poseidon entered the realm of Hades in retaliation for losing one of his mortal daughters to Hades' underworld realm. Poseidon used the deadly waters of river Styx to flood Hades' realm, showing clearly that he was the more powerful brother. He then left with his no longer mortal daughter and Hades and Persephone spent the next few centuries with a mop and a bucket.