Wrong he means one that shoots a black portal on one side and you can walk through it to get to the other side of it in other ways
O=black hole | = wall
O||||O
see.
Oh, very well then.
Now I see what he means.
Due to that fact, the add-on isn't a black-hole generator.
It's an item that when you fire it at a wall, you're able to walk through that wall, am I right?
If I am, this request clearly isn't a Portable Black-Hole/Black-Hole Generator.
It's a . . . well, I can't describe it.