Well, it depends on how the prototyping works. From what we've seen, it looks like they only take some feature of the creature that was prototyped and none of its powers. However, the queen will suppousedly take the powers of that Lusus, and if she does, man I dunno.
"None of its powers"? The Nannasprite, prototyped with the ashes of an old woman,
gained the power to tear down Ogres with a laserbeam of pastries and a healing oven. The Calsprite, prototyped with a ventriloquist's dummy,
gained a laserbeam of puppet-ass and could transform into a giant plushie missile. Lord English only knows what will happen when you chuck the corpse of a minor god into a Kernel.
I'm a little more concerned with the foreknowledge that all of the lusii will die. Just
what is going to kill that thing first, and what will happen when it does?
Actually, I suppose it will, exactly as advertised, release a psychic scream that kills all of Troll civilization in the galaxy. Except for our erstwhile players, safely ensconced in another dimension. Except the lusus has to die to be prototyped before Feferi can enter the Medium, and Sollux comes after her. Maybe that's why Sollux is so obsessed with how he believes he'll die twice? Intriguing.