hey, hes not completely outa chakra, i mean he still has sharingan active, and you need chakra for that. and it wouldnt be all that surprising if orichimaru had his own seal. tsunade had her healing one, jiraiya had his toad form thingy. orichimaru has to have something other than just reincarnation jutsu. thatd be gay, he was trying to master all the jutsu, and he said he created more.