Lets see, I have a mountain perfect for a house....but I can't mine it without taking forever!!! lets blow it up with some tnt!
Yeah, this idea could definitely use some elaboration, I, most like others, don't find satisfaction in ready two lines of incomplete text. Explosives, if they're not already in-game would be good, but would have to be limited in a way.
So I've been playing Terraria... and you can do exactly that, blow up a mountain with a rocket launcher.
There are already bombs in the game. I use them to quickly mine the super hard materials like obsidian.
There is (or at least WAS) a mod before with Unknown Explosives and it had a radius of at least 30 tiles. Survivalist, I think, so I am pretty sure you can edit those values.. But at the same time, it's also a whole conversion mod, so maybe he altered things to be able to alter other things, if you follow my meaning.