User blog comment:Xilinoc/Ch. 598 - The Shooting Star Project (We Only Have To Beat You Mix)/@comment-24934641-20140925180954/@comment-5398287-20140925184240

Next chapter will likely prove whether or not that's true. I've had some doubts about it myself, mainly because that would make Yhwach OP beyond all belief (simply sustaining his lifeforce and possibly increasing his strength, on the other hand, is fine with me).

However, I do find it hilarious to imagine Haschwalth and Uryu cheering him on to activate The Superstar.