"About the Yin Seal... since you could undo the barrier without alerting me, you've clearly built a decent foundation in Sealing Jutsu and Barrier Ninjutsu. Looks like you haven't wasted all three of these years. The things you were supposed to learn actually sank in."
As he spoke, he turned toward Uzumaki Mito beside him and smiled.
"So, sister-in-law, back then you asked me to set a standard Hibari had to meet before you would teach him the Yin Seal... well, I think he's met it now."
Uzumaki Mito didn't seem surprised. She simply smiled gently.
"I thought you two had forgotten all about it."
"How could I forget something this good, Grandma Mito?" Hibari immediately chimed in, beaming. "I can finally learn the S-rank Yin Seal! Since I can learn that now, does that mean I can learn your other Sealing Jutsu too?"
Seeing how delighted he was, Uzumaki Mito finally nodded.
"Whatever you want to learn, just come see Grandma."
Hibari immediately showered her with sweet words, promising to buy her all sorts of wonderful gifts in the future, until Mito was all smiles.
Once the excitement died down, Senju Tobirama cleared his throat and brought them back to the subject.
"That settles the Yin Seal. You can go learn it from your Grandma Mito later."
"What about Flying Thunder God?" Hibari hurriedly asked, his eyebrows shooting up.
Senju Tobirama smiled at his eager expression, but kept him in suspense.
"As for Flying Thunder God... whether I teach you depends on tomorrow's assessment. You'll have to show me a performance I'm satisfied with."
"What other requirements are there?" Hibari grew a little anxious. "If we're talking about knowledge of space, I'm sure I know enough! If you don't believe me, Grandpa Tobirama, make me a test. I'll take