The King in Copper ruled a civilization that adjoined (and eventually was subsumed by) these swamps. While libraries wax poetic about the King’s wisdom, wealth, and magic, they were better known for their arrogance, ambition, and cruelty that lead to forming pacts with foul entities beyond the reach of their civilization. The dark pacts of the King in Copper granted them the ability to manipulate the water, plants, animals, and even the lands of the swamps that extended around their ancient kingdom. Knights of the kingdom would ride upon King Crocodiles that weighed over a tonne through whose eyes the King in Copper could see with a thought.
The entire kingdom was put to sword and flame, the King slain, and their body thrown into the swamp where an isle of stone lifted up from the marshy waters and seemed to consume the body, forming stony crypts for the King and their slain generals.
The crypt island remains to this day, lost in the swamp that eventually consumed the lands where the fallen kingdom once stood. The crypts are within a massive stony abutment that is now covered in moss, swamp muck, and plant life. The main level of the crypt (on the left of the map) is flooded, with brackish swamp water about two to three feet deep covering the floors. The upper level (on the right) is drier but still damp and unpleasant. None of this is improved by the foul froglike swamp beasts that have claimed it as their home.
Of note on the upper level there is a “well” that leads down to the upper left room on the lower level, as well as a collapsing chamber on the upper right – that room has wooden braces mounted to hold the collapsing walls and ceiling back. The braces are tied together with oiled vines and if pulled the whole assembly will come down, collapsing the walls and ceiling and “hopefully” providing an escape route to the residents.
The 1200 dpi versions of the map were drawn at a scale of 300 pixels per square and are 10,200 pixels (34 squares) wide. To use this with a VTT you would need to resize the squares to either 70 pixels (for 5′ squares) or 140 pixels (for the recommended 10′ squares) – so resizing it to either 2,380 pixels wide or 4,760 pixels wide, respectively.
https://dysonlogos.blog/2023/10/18/sunken-crypts-of-the-king-in-copper/