Miner in the current meta is a very versatile Class that is not only used to increase the ore income but also to get Furnaces and Coal for free. The way this is done clearly shows that this was never intended and so I´m proposing this probably unpopular change: Miner The furnace is now Soulbound The placed Furnance smelts at double speed and doesn't require coal to work and only accessible by the owner however, it will disappear and drop the contents on changing classes like the alchemist stand. I believe these changes give back the meaning of the coal mine, as well as the necessity to collect cobblestone to craft furnaces, it´s still Minecraft after all and those tasks shouldn't be skipped by abusing a feature made in good faith. Please let me know what you think about the current miner and if the proposed change would be a good addition or not. PS: If you place the furnace in the mine while you are farming you would leave with approximately 8 iron, and in base you can smelt in both Ender and miner furnace 18 Iron per minute. It is as fast as 3 furnaces combined but you save time because you don't need to /kill and hope no one else picks up your stuff.