Well, he can tell that she's not joking now, anyway, that she's being entirely serious. If someone had put her up to this, he's sure that the joke would have revealed itself by this point. It's also... a really strange thing to joke about, anyway. It wouldn't make sense. So he finally dismisses that idea.

He returns to the letters as directed. The sense of foreboding grows when he notices the blood stains on the next paper, which looked to have been hastily torn, and just as hastily written on. Something is amiss. He's not sure why, but he can tell already there's something wrong in how the other- in how he had written this. Has written... is going to write?

He carries on. The next one is worse, and he has to really look closely to make out anything in the scribbled out portions. "...growth... something about growth... 'something growth is softening'?" He mutters under his breath. "Sickening?" Brow furrowed, he continues, and the next letter makes it all too clear that a terrible fate is in store. The very last letter, with the barely decipherable 'Save me' is chilling.

Now when he looks up, Kain's expression has turned especially somber. "Tell me. What does this mean? What did I... What's happened to me?" Will happen. Whichever. "How did you even get ahold of this?"