Originally Posted by Senkradlol
When would have Itachi have needed to use Susanoo though? I guess against Madara/tobi , but to the point where he can't stand in the rain?
Idk, I think he had something wrong with him, of course the MS techs didn't help him though.
Itachis sasanoo is supped up with three spiritual equitments.
1. The Sword of Totsuka the seals away the enemy in a drunken genjutsu forever.
2. The Yata Mirror that can deflect ANY attack!
3. The Yashi Magnatama that allows itachi to through huge tomoe shurikan and maybe even something else.
IMO, by first having to complete his sasanoo then go around, find and add these equipments itachi over used his sasanoo which is why he was spiting up blood and acting weak just as sasuke did.