A lot of people have been pming me about the seasonl to get the samurai armor since i was able to complete it. This seasonal task has an issue a past seasonal one did. here is the "fix" that should work
if you bought the "defense stone of bushido" before completing gn the taks will get stuck.
Put the piece in your league pack, so the seasonl think you do no yet have the piece.
The season should read that you have 0/1 pieces.
Just to be safe ( not sure if this is needed) reload
Leave the piece in your league pack, and go a run of gulu normal.
Make sure after completing GN that the seasonal task says you have completed GN
Take the "defense stone of bushido" out of your league pack.
The task should now be complete.
I am in no way saying this is a definate fix, but this worked for me, as it did for a past seasonl that got stuck
This is if you have already completed gn three times