Ok, I have several stuff to ask about Ryuurin no Tessaiga.
In the test, Inuyasha was told to search for the youketsu. Because of the fact Kanketsuhen is rushing stuff, this went quite quickly in compared to seeing the Kaze. So Inuyasha became able to see the youketsu. He then cut it using the sankontessou ability. If he could see and cut youketsu, what's the reason Ryuurin no Tessaiga is the sword he uses for the ability? And if at all, he could simply use Tessaiga, no need for a different form.
Is it because he used Ryuurin no Tessaiga's ability and absorbed Yourei's energy that his sword became able to cut youketsu, and only in Ryuurin no Tessaiga? Then how could he have cut that youketsu earlier?
Another thing is the use of the sword on Magatsuhi. How is it that Magatsuhi wasn't able to move? And how couldn't have Inuyasha, if at all, use the ability of cutting youketsu on Magatsuhi?

