[Kyu410]

Originally Posted by Sazelyt

It is just an upgraded version of Sharingan. It allows the Sharingan carrier person to use highly powerful jutsus.

Other than that, MS has never been used for anything other than those special jutsus. So, you can currently assume that activating MS means, activating one of those special jutsus. And, in a similar way, using those jutsus means activating MS.

Spoiler for future expectations based on what was observed in the manga:

You can assume the overly powered God of Narutoverse, Kishi, has designed Sharingan to be above anything in the Narutoverse, capable of doing any jutsu any other person can use, and any jutsu any demon can use, and any jutsu no human or demon can ever use. Yes, it is that stupidly overpowered.

Hopefully Kishi will make it so byakugan has a second or even third level to balance eveything out.

Can someone tell me what the 4rths name is? I heard that his name is Arashi but I'm not sure.