Thinking about cool things I can do with the Destruction Catalyst. It could have its own gunpowder storage, similar to other items. Also, having some left-click capabilities (destroy a block for a fraction of charge) would be interesting.

Perhaps a "charge up" key, such as 'v' that would increase the AOE and the gunpowder used per use. (and of course a charge down key would be needed)

You're killing me. I see where you're going with this.

I made it toggleable, I'll consider the thing I was talking about, and not the thing that other guy was talking about. Because that other guy was talking about Equivalent Exchange. Thanks homeboy.