Inspired by the return Reviresco's Sub-Mariner Advent Calendar, once again I bring you The 12 Days of Santa Doom!. which I posted some years back before the board rebooted, around 2015 IIRC.
The story of Santa Doom was told by Scott Lobdell and John Byrne in the What The -- ? #10 Xmas Special. The story was reprinted in the Marvel Holiday Magazine (2010). So I will be mashing up Santa Doom with the 12 Days of Christmas, probably one of the more annoying holiday songs.
First seen in the Jonathan Hickman / Esad Ribic magnum opus Secret Wars series in issue #2, we see God Emperor Doom on his throne made from the World Tree with Sheriff Stephen Strange and the Emperor's Royal Consort in attendance as judgement as passed in a dispute between Captain Britain and Mister Sinister.