I got the ninja pig spell from Koto a couple of months ago, I fought him about 45 times before it finally dropped. I doubt the treasure table has been changed since then. So yeah, you can probably still get it, but you have to be VERY patient.
I just helped a lower level myth student get the spell from Koto a couple weeks ago. It's much faster and easier than Loremaster. Luckily it's a very quick and easy battle because it usually takes a LOT of tries.
Yea bro koto in mooshu still drops it I am a level 51 myth in celestia and I have been farming it for 3 days takes a while but really easy to get instead of doing loremaster by far just have to be patient and I mean really patient lol