Hey guys!

Wanted to do a quick test actually since Madara passive doesn't specify anything such as "as long as this ninja is alive".

So I decided to test out whether there is any damage change if he is dead. (of course I didn't take ALL screenshots but I wrote the damage variety that I had)

Here are the results:

Madara alive:

Damage = 4,3 - 4,7k

Madara dead:

Damage = 3,9 - 4,3k

Conclusion: seems to be the case that buff disappears once Madara dies