(scorpion mob) Goldbug

This would be a rare, wall-climbing, golden scorpion that would spawn most commonly in mineshafts. This scorpion would be attracted to gold ore and would turn it into stone if left on it for 15 seconds or more. It would also eat any gold items left on the floor. If you threw enough golden food items on the floor (over 5) it would have a chance with each food item you give it to become tame. A tame goldbug would need more golden items (the more gold in the recipe, the better) to serve its purpose. What is this purpose? Well...

Once a goldbug has eaten 64 ingots worth of gold, it would grow in size and need to shed its skin. With a silk touch pick, you could instantly finish the process rather than waiting an hour. This shed skin would drop as a glistening shell once the process is done, which could be equipped to function as a full set of diamond armor on any non-rideable tamed animal (including foxes that trust the players enough to defend them, because yes, that's apparently a thing). It would not be enchantable but would come with automatic fire resistance. This would finally make dogs viable as nether companions.