Board Thread:Theories and Speculation/@comment-1458758-20190708202646/@comment-3568954-20190708231808

a big part of the edo tensei was psychological warfare. you capture an enemy than you revive the soul of one of your own shinobi and bind it to the body of an enemy. than you send that edo tensei body into battle. you have a warrior who is immortal with unlimited chakra and because of the immortal body you break your enemies moral. using the spirit transformation jutsu in conjunction of it would defeat the purpose, and would leave the Edo Tensei body souless and as such allow the enemy to seal the body which would defeat the soul transformation jutsu