In the beginning, Sarutobi Konodama studied with three generations of apprentices, created various spells of his own, punched Danzo, and kicked Orochimaru.
What to do if there is no system cheat? Then think of yourself as the cheat! Unprinted spells, mysterious eye spells... They don't just require hands.
Naruto, I'm sorry, I will accept your mother;
Obito, you can go in peace, I will take good care of Lin;
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