A simple box I created that'll hold at least 60 sleeved cards in the main slot (dragon shield matte tested), a sideboard and potentially token cards, and a space for dice/markers that will hold d20s. Variations of the box bodies with mana symbols (I created so they aren't great) and a logo box.
Lid fits snug, I added a small ridge on the short edges to help grab as well. Not sure the longevity with the tight fit, others I had printed were generally very loose fitting though.
Added v2 bodies with an arc cut out along the top to allow easier grabbing of cards without having to tip boxes. I have not yet printed this version, but it was just a simple 3 point arc cut so I don't anticipate any issues with the print.
Also added v3 with 10mm cutouts through the interior walls to save printing time and plastic. I chose 10mm to allow 12mm dice to be stored without issue. The v3 cutouts cut my projected print time from 8h17m to 7h27m and from 129g to 110g of filament. I would print this, and all models, bottom down to reduce bridging requirements.