Formerly known as the "Midsummer Murder Foehammering Apocalypse" the 20,000 league mysteriously vanished for a year, along with the league commissioner, to the Southern Wastes.

The original, opal encrusted trophy never returned and according to the commissioner was "lost aboard a dwarf Nautilus" that was returning the trophy to the old world for safe keeping. In the mean time, an IOU note has been substituted, along with a rough suggestion of how far down people will have to swim to collect their trophy, hence then name of the league.

League structure is Open Round Robin - i.e. you have to play everyone once, but the order you do it in is up to you.