[Icecolduchiha]

Originally Posted by Fukitsu Naruto

Spoiler:

-It's called a Cursed Seal right? Normally curses disappear with the demise of the one who created the curse. Of course there are always exceptions. And even if it doesn't disappear there's always the possibility of dispelling it by other means.

Spoiler for manga:

....not really, the curse was genetically derived from another person's blood, oro ust experimented with it...

plus it likely has more to do with the uchiha's then oro,look how likely it is to the sharingan with the tomes and all... Plus it basically transforms people into a tengu which MS is the symbol of in the mythology's...