Ignited Blackstone Tools

Blackstone tools could have a special purpose beyond just being an alternative for stone tools. Blackstone comes from the Basalt Delta, a formerly volcanic biome. There could be some latent use for the material that has been dormant due to the cooling and hardening into stone. After crafting a new Blackstone Pickaxe, the wielder could "charge" the tool with blaze powder to ignite it. While ignited, the texture of the tool turns volcanic, and it will instantly smelt any blocks you mine as long as it has fuel to keep it ignited. Iron ore becomes iron ingots as soon as it is mined, smooth stone would remain smooth stone since cobble would be instantly smelted into smooth stone, an axe would chop a trunk instantly into charcoal, etc. Blaze powder could be used up to charge it for 15 to 20 (as an example) blocks before it uses another one. If blaze powder is too inexpensive for this functionality, maybe a new crafted fuel source could be made to charge the tool. Since the durability and power of the tool is equal to stone tools, this balances out the power to instantly smelt whatever you mine. Or, you could enchant a Blackstone tool to have "Ignition I" so the player has the option to make use of this functionality rather than use it by accident if they have blaze powder (or whatever fuel source to ignite the tools) in their inventory.