Talk:Tamamo no Mae/@comment-4802891-20180117071534/@comment-27971189-20180117215135

You can't really use Fou as standard of Beast IV true capabilities.

Beast IV resurrect Mashu with fact that he is not even in his strongest form. Fou is his weakest form, and what he did to Mashu is simply gave her a good amount of magical energy he accumulated through years-- and by doing that, he also granting Mashu lifespan equal to normal human at cost of his Beast 'title' which happened because he's on his weakest form.

Moreover, if it really consume his entire life force, Fou is pretty much dead. Mashu only took his savings, its the extra that come with price.