[Jetfire's quiet for several kliks this time, the first time he's actually hesitated to say anything. Because let's face it, this is kind of... sensitive. And even more less anchored in factual reality than what he's already said.]

Not power anything as such; rather break down. The device was supposed to open a sealed area of the Well of All Sparks.

[Of course, he's not going to be completely forthcoming here, so maybe it'll sound more normal than Jetfire trying to recount what the Fallen said.]