Well, luckily, I did have some prototypes I had mothballed... [He chuckles a little, mostly to himself.]

Basically it's a capsule that you can toss at a disable Warp monster which will rapidly suck it in, and then immediately collapse on itself, sending it and its contained quarry back to the Warp. I... don't have many ready but I can give a few out to you and anyone else who's going to be hunting these things.

The real question is whether the gate is still open over at the Domino Academy, and if it is, how we close it.

And then... there's who summoned monsters from the Warp in the first place. [He does not seem to be, particularly enthused about that last point.]