As this was said in an ealier post, just keep trying. If you get it withing 5 tries, congrats. But if it takes more then 10 tries, keep trying. Everything goes at its own pace. I had to fight Oyotomi 20 times to finally get on my Balance the Life sword when on my Grandmaster Myth, I got Life Sword on first try. (I should be a moderator, not really)
since i'm IN mooshu and defeted too of the onis ill get you guys on track the war oni is the first contained in crimson felids defet warlord kasumori and you see this oni apper plague oni this oni is found in a temple wasteing all of mooshus pure water. next is the death oni who possesd the tree of life and you must deafeat it.last the jade oni the final boss of ninja pigs summen it by lighting the oblisk (after you beat all four onis) note:the onis WILL drop sword wands BUT the jade oni dose NOT drop a jade oni pet you buy it with crowns in DS along with a cool pet called storm hound dont bealive meh? ask a buddy to take you to the DS zeke
the onis WILL drop sword wands BUT the jade oni dose NOT drop a jade oni pet you buy it with crowns in DS
Isaac Nightgem magus ice wizard
This just confuses people when you say something and you arent sure if its true. Im not trying to sound rude but i take it you havent gotten the jade oni pet from the jade oni, so you say you cant, but in fact you can get the jade oni pet from fighting the jade oni. I have personally got the jade oni pet from a drop from jade oni, so it is possible.