Well, if you mean the one in Chapter 4, that's what I'm trying to find out (I assume probably from some magnet-related contraption, but nothing currently fits the bill).
You get Bottled Blackhole by using an evocation on the Black Hole Bomb in Chapter 2, and the Broken Lantern by using an evocation on the Gravity Pad in Chapter 3.
For Chapter 1, I couldn't find a hint at all, unlike in the other three chapters.