FIRST you will need a common earth stump sold in parts at your local space market, any tree° will work, DO NOT USE MANE TREE STEMS OR VINEGAR BATHED SILICA BASED ORGANISMS, you will now drill a hole in the middle of the stump and place mushroom spores dead plants and other decayed matter for further festering of the inner wood, let it corrupt the complex sugars and the celulose and when it becomes mushy, insert five ounces of pure enriched uranium and water, let it simmer for two to three billion years in a sealed fused barium prism under the surface of a warm environment, like Venusian terrain or Arizona if you are one of the game show mortals on earth
After all of that is done, your stump should look like this