Not into play so says the mods. it is one of the few functions we are missing from the 2.0 advertised here: http://naruto.oasgames.com/en/event/version/main.html?6

from what i can note there are 2 missing:
1) cross server arena(also where my season rewards)
2)Cave keys in wishing tree

I think it is safe to assume we will not see any other major content until these are implemented. yuusuke jjang This post was last edited by Honeylemon at 2017-2-2 11:44

I am aware of future content but those two weekly events were not advertised in the 2.0 update shown on the main page. i do remember them being shown in the image but was not stated to be put in

never see people talk about it so i guess its not used much, my mistake