It's called black hole generator in-game but topic would not be so clear with that.
Can break most blocks instantly.
Can kill mobs instantly.
Right click on blocks deletes them with no drops.
Right click on blocks with interfaces can't be deleted.
Recipe: I don't think you'll get it by conventional means but I think if you are determined you can get it normally and not feel like a cheater. Although it is very overpowered anyway.
Main link :
Use if mediafire doesn't work:
How to install:
You need ModLoader 1.2.4
After that - just drop the .zip in the .minecraft\mods\ folder. (or you can extract it in the jar)
Uses id 3105. Please tell me about ID conflicts. I'll try to add a config file.