Oh, don't worry, I'll explain why Rathel's Rune is basically ripping Khan's chest apart. Rathel, after Annabeth was tossed, would now have tried to turn his vines upon himself. The bad thing is he doesn't know the Runes are currently at their limits and hopes by killing himself to return to the Inferno, he'll right it. Instead, he's killing Khan and Lucilia killing Upsah is just adding to that. :p 

Also, on a minor note, Lucius, Rtron asked me while he made his post if he could say that Satori's message got through and I said yes. So you might want to edit that bit if you don't mind.