When the members of the Uchiha Clan saw their Deputy Clan Leader, they wanted to go over and pay their respects. After all, he was the clan's strongest fighter, and in a ninja world where strength commanded respect, many clan members admired Shin Uchiha.
But just as they were about to approach, their Deputy Clan Leader waved them off and hurried away. Everyone who encountered him was puzzled, wondering what Lord Shin Uchiha was so busy with. If their Sharingan hadn't confirmed that he really was their Deputy Clan Leader, they might have suspected a spy had slipped onto Whirlpool Island to gather intelligence.
Shin Uchiha spent two full days and nights working like this. Aside from taking a moment to request leave from the Third Hokage, he spent all his time running around Whirlpool Island, placing space marks one after another.
At last, Shin Uchiha placed the final space mark on a cliff at one end of Whirlpool Island.
Finally done. Shin Uchiha let out a long sigh of relief inwardly. Once he had secured their base, he would be able to sense anyone who arrived on Whirlpool Island, whether it was White Zetsu, Black Zetsu, or Obito Uchiha using Kamui.
There was still one final step. Shin Uchiha traveled directly to the center of Whirlpool Island through a space mark. He took a deep breath and formed hand seals, his expression solemn as he began mobilizing all the chakra in his body, sending it streaming into his eternal Mangekyō Sharingan.
His already activated eternal Mangekyō Sharingan spun faster and faster as chakra and ocular power poured into it. As his Mangekyō Sharingan rotated, the space marks across Whirlpool Island gradually lit up, shimmering with sky-blue light. The connection between Takamagahara's dimension and the hundreds of space marks on