For its price, it's quite overpowered. It creates a large tunnel that is already lit with extreme torches and destroys everything but ores and ore blocks. It even creates a barrier against lava!
Description copied from the OreSpawn website.
The Miner's Dream block is pretty cool! You've gotta try it! Make one. Now. Take it underground, tap it on a stone block directly in front of you at your feet (not on a diagonal), and be amazed! Indeed. It removes stone from a large area leaving only the ores behind, instantly. It even lights the place up with torches. All you need to do is run amok with your pickaxe and reap the rewards!
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