This is a fantasy cosmogony. Cosmogony refers to the study of the universe' foundations and the relative processes. By association, it has also come to cover mythological and artistic depictions of a given cosmic system. It is a topos in paintings, which can be found from the Renaissance to Magritte and of course, later fantasy works.
This particular one spreads over a box and is derived from viking themes, with little historical accuracy.
Yes, I like drawing boars (wild hogs). And hands. The accidental lighting is the perfect occasion to show that woodburning creates grooves in the wood. It isn't just surface colouring although it is possible to achieve such a result with industrial processes or controlled flaming. Essentially a soldering iron, a woodburner will require dragging the point across the wood to produce a pattern.
Here is another distinctive example of the material aspect of woodburning. It can be felt when sliding a hand on the decorated surface.
This is on the side of the box. The left-hand corner, particularly, is historically accurate. It is copied from Irish manuscript's patterns. Celtic knots and pictural symbols are by no means stricty symmetrical. They used spirals, three-pronged patterns and knots sometimes in glorious profusion.
The door to Moria is an essential topic in my close circle's cinematic references.
The main piece, the box's bottom, starts there. It centres around Yggdrasill, Norse mythology's spine of the worlds. It is a, ash tree.
Then Jormundgandr appears. It is the sea snake which surrounds the Earth and whose every turn starts storms.
Now a close-up on a viking ship. Yes, cruising some sort of ether.
The word "drakkar" is not used in academic papers. It was apparently made-up in the 19th century newspapers and has no linguistic connection to Norse ships whatsoever. They were called according to their use. Longships is the generic term for the viking's attack ships.
The whole piece is Yggdrasill making up the universe, encompassing everything with root, leaf and knots. Some resolutely not historic troll shows interest in the whole thing.
Troll was a generic term in Norse epigraphy which refers to intelligent beings, possibly human-shaped and associated with magic. The image we have of them comes from 19th century folk lore collectors and illustrators, such as Moe and Asbjornsen.
