User blog comment:Omega natsu2/Chapter 369: The Place Prayers Reach, Predictions./@comment-31.132.65.50-20140129025714/@comment-7418318-20140129172732

"he just couldn't utilize his magic to the fullest"

So you say "not at full power" and "weakened" mean different things? Because for me those two terms are equal. Just 1% less powerful is still weakened, even if just a bit. And considering the "power-up" from re-absorbing Siegrain, it's clear he invested far more than just 1 % of his magic power into that.