User blog comment:B214/Episode 216 rant, review and discussion/@comment-24951162-20150117052036/@comment-7418318-20150117103117

He shouldn't have this mode with Leo's magic though.

When he ate those dark flames, light or whatever, it couldn't properly coexist within his body and made him sick. In the end he even said that he finally got all of it out of his system. If he got all out of his system, how can he use it now? And if it wasn't out, why did it stop making him sick?