Hi there and welcome.
Nice piece of deadwood you've got there.
I collected a couple myself last year (but blacker because more decomposed already) and the goal will be to make some Tanuki...
The tanuki is a mystical animal in Japan, a little prick indeed who could transform in a lot of stuff and trick the humans.
But it's also the technique consisting of putting (screwing, gluing, anchoring somehow) a living tree on a piece of deadwood.
As the tree will live and be outside the first steep is to prepare the deadwood in order to prevent further decomposition (the most radical way would be a coating of epoxy, a more gentle, although less efficient way, would be to protect the deadwood with vegetable oil, ideally olive oil).
Then you have to put the tree.
I will be at the protecting part of the stump as soon as my 'winter studio' will be ready for 'winter bonsai related activities."
The mythical tanuki:
The kind of tanuki I am looking forward to make: