Board Thread:Theories and Speculation/@comment-26388300-20150523085628/@comment-734582-20150530105741

GreatestSin wrote: oro had enough chakra since he mastered sage mode but he wasnt able to use it since his body was to weak, and therefore he created the cursed seals, that measn that the body needs to be strong enough too :) We know that you need a lot of chakra to counterbalance the "foreign" nature chakra, but maybe there's something more to it. For instance, we don't quite know how Orochimaru's body transfer works, but it seems to be similar to Edo Tensei, except he uses it as a still-living being. Perhaps the fact that the host body already hosts an "unnatural" chakra in the form of Orochimaru, it can't properly deal with a second "unnatural" chakra in the form of Nature chakra. Perhaps the strength of his techniques depends on the chakra reserves of his host body, and so if the Host doesn't have the correct reserves Orochimaru's reserves are limited too.