Naruto: Extreme Bloodline Limit

They said the pain a woman suffered in childbirth—especially with her first child—was like having every rib in her body broken at once. That was no exaggeration. You could hear it in Kushina's hoarse, exhausted screams.

At the same time, a pitch-black figure slowly slipped inside. Minato, wholly focused on Kushina, did not notice that the seal could not stop this person from entering.

"Nine-Tails... Uchiha Ronglin..."

Black Robe let out a low, cold laugh. He passed through the seal without the slightest obstruction and entered it, muttering words too faint for anyone to hear.

The person who had entered the seal was undoubtedly Uchiha Obito. At this point, he was wandering everywhere under Madara's name, bringing Black Zetsu with him as he infiltrated Akatsuki, indirectly controlling Akatsuki and controlling Nagato.

Before Madara left, he had given one instruction: the Nine-Tails.

According to Madara and Ronglin's discussion, Madara was to release the Nine-Tails, and the Nine-Tails would belong to Ronglin.

But Obito had no intention of doing that. Now that he had fallen completely into darkness, the feelings he held toward Ronglin were no longer worship and respect, but hatred.

If Ronglin had not refused to go to the front line back then, and had instead brought out his strongest power to defeat Iwagakure, then Minato Squad would not have remained on the front line the entire time. They would not have gone out on a mission because of it, they would not have been ambushed, and Rin would not have died.

While resenting Ronglin, Obito also came to hate Minato. If Minato had not gone to support others, how could Minato Squad have been ambushed? How could Rin have died?

Never underestimate a person. If that person's heart was completely dead, if their entire being had sunk into darkness,