In Naruto as Ten Tail

Everyone was once again astonished hearing the boy's analysis of the situation, in the moment of despair all of their minds seemed to have stopped working. They were all so engrossed in thinking of how to survive that they forgot what he wanted to do with them.
Tsukimi raised his head a little higher to look in the eyes of the boy before replying, "What you just said is on the point, I want you all to do something but before I tell you what it is, I think there is a need for a new leader."
Tsukimi's words caused everyone's hearts to beat wildly. Since they were following the teachings of their ancestors they have been long dissatisfied with their old clan leader but could not stand against him. This was the reason they have been amassing strength in secret to start a rebellion and overthrow him. Now that their wish has been fulfilled indirectly, they could not help but cry tears of joy.
"Tsukimi snorted, seeing their expressions of joy at the deaths of their own family.
'Pathetic'
Tsukimi thought and ignored them while turning towards Toneri. Toneri was shocked to see Tsukimi walk towards him and placed his finger in the middle of his eyebrows. He trembled in fear as he could feel something entering his mind.
His moments caught the eye of the people around them and they continued to watch in shock as some weird patterns flew from the tip of Tsukimi's finger and entered the head of the boy.
After a few seconds Tsukimi retracted his fingers and said, " From today onwards you are the head of the Otsutsuki clan, I have placed a seal on your soul that will blow it up if you dare to go against me."

Toneri's eyes widened in shock as he heard he had been branded with such a seal. Not only him but the rest of the Otsutsuki clan members were shocked to hear that A tailed beast was able to learn Seals to such a level that he could decide their fate.
"I am not sparing you to go against me so be careful of what you do. I won't make you go against your so-called ancestor, Instead what I want you to do is aligned with what he wants so no need to be agitated."
A series of sighs of relief echoed in the room, they did not want to be forced to do something that their ancestors did not want them to do. Tsukimi did not care about what Hamura wanted in the least, he just want his time with his family to go without any interruption and a powerful clan of Otsutsuki bloodline was just enough for the time being.
Walking back towards the throne, Tsukimi sat on it and tapped his feet on the ground twice. Sever black characters started spreading with Tsukimi as the center and enveloped the entire area of the moon which was being used by these people.
"Don't think that if only Toneri has the seal you won't die, the seal is only a medius. It works on the basis of bloodline connection, since you are all Hamura's descendants you all will die along with him and the reverse is also true. If one of you dares to betray me all of you will perish, so be careful of how you act."
Tsukimi declared seeing the look of glee on their face, he realized that they were happy that they were not marked with such a seal. Just as he expected, as soon as those words fell in their ears everyone went into a state of panic, be it older people or the younger one.
"What!! This is unfair!!"
"Why would I have to die along with others?"
" I can pledge my loyalty to you but let me live."
Everyone started pleading for their lives and did not care whether the other died but they did not want to die for the mistake of others.
Seeing their state not only Tsukimi but also Toneri was disgusted to the core, he realized that the people who were always smug about being a Celestial Being above humans were no better than they are when it came to their life.
Sighing he turned to look towards the man who made them behave like this and his gaze was filled with a little admiration. He could tell the true nature of the man a little from the way he interacted with them and came to admire him a little too.
Tsukimi was getting annoyed hearing their noisy pleas for their lives and released his pressure. His figure turned into the Kitsune form and tails sprang out from his back. His ethereal and handsome appearance caught the eye of many female clan members and even some males were entranced by his looks.
The cold temperament on his face highlighted his looks even more, "You inferior beIngs should be glad that I decided to spare your puny lives and yet you dare to demand me to give you freedom. On what basis do you have the right to ask that?"
His cold and enchanting voice caused everyone's heart to tremble in fear while the reason for some females to tremble was different as they fell to their knees and gasped for breath just like everyone but their pale faces had a sharp blush on them.
Seeing that everyone had calmed down, Tsukimi decided to continue speaking. "You all will listen to Toneri and Guard the earth just Like Hamura asked you to and whenever someone from the main clan approaches, capture them and If you fail to do so, Toneri will inform me through the seal."
Seeing everyone nod in agreement Tsukimi turned to look towards Toneri and added. "I have placed seals in every room of the clan to let you all improve chakra control and further advance in power with it enhancing your bodies. If you work hard enough you might be able to awaken Rinnesharigan or Tenseigan."
Silence!!
Everyone even held their breath hearing his words.
Rinne-Sharingan!!
Tenseigan!!
Those were the legendary eyes of their ancestors and they can awaken them with enough hard work. Their eyes shone in anticipation and longing along with a fire.
Fire to obtain those legendary powers!!