[itachi-san]

Two armies face off on either side

They make noise when they collide

Only one general controls both fates

And can only leave them in two states

[Guest]

a kid making and eating a bowl of cereal?

milk/cereal as armies

the noise is the crackling sound when they mix

the kid as the general

two states could refer to liquid and solid as well as eaten or not

[Brandonb]

This works perfectly, so you get the e-kudos Brandonb. Well done! It's always cool to see a riddle get solved with an answer I hadn't thought of, as long as there aren't a ton of 'em Below is the answer I had in mind.

a zipper

Sweet, thanks. *repetitively acts-out my answer for itachi*

[onetruth]

I love how itachi's riddles are either way more simplistic than we think or far more complicated than we think. lol

[Guest]

This works perfectly, so you get the e-kudos Brandonb. Well done! It's always cool to see a riddle get solved with an answer I hadn't thought of, as long as there aren't a ton of 'em Below is the answer I had in mind.

a zipper

That makes me happy--I got brandonb's answer while I was still reading responses on page 1! Your intended answer works better, though, I think--the answer we came up with doesn't work as well with line 4. Nice riddle!