Board Thread:Naruto Discussions/@comment-25369463-20141001042907/@comment-25237676-20141001122251

after time the hand seals became useless. for example chidori. sasuke now use it when ever he wants. maybe obito doesnt need hand seals for rinne tensei too but needs the hand seals for the sealing technique and tried to use the sealing technique from the beginning but could only resist midway