As of now, no. More skill mutations will come in the future. We actually talked about mutations not that long ago due to higher amount of requests. But I can't give you specific date or not even month when more mutations will come. BUT, they will. They are on the "coming soon" list.
But please, don't forget all the common ninjas skillbreaktroughs we still miss, there are really a lot (kiba, choji, shikamaru, shino, ino, hinata, kabuto, kimimaro, shizune, anko, haku, jirobo, jugo, karin, tayuya, kisame, suigetsu... and I'm literally listing only the very very basic ones...). It's really hard for us to understand why takes this long for them to be implemented, overall knowing that most of them are useless or useful only in specific situations. May you please explain to us why you don't simply implement 1/2 every week? Or 5/6 in a row once per month? I understand they don't bring you money but still...
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