i know, im trying to give you constructive criticism, trying to help.

dude its my 1st build

i noticed you changed the build a little bit, getting infinity edge before frozen mallet. i like your idea, but in your particular build, i disagree with getting infinity edge all together because your build isn't focused on critical strike. I would suggest an item like black cleaver or bloodthirster to replace it. Just my suggestion. Otherwise i think its good, and i like the hextech gunblade idea, never seen it before so im curious if it works. Could use some improvement, but i think its got potential, ill give it +1

I disagree with this build, only because the items that your getting are so expensive. its hard to start a game with an item as expensive as frozen mallet without having any damage under your belt. I also disagree with the guy above me. Yes youmuu's is a good item on xin, but there are numerous ways to build numerous champs and no champ MUST use a certain item. Why does he need cloth armor and 5 hp pots also? Just because thats what everyone else does?? Thats why he is making a new build, because its something different. Its pointless to come check out a new build than criticize it because its not the same as all the others, in that case we would only have 1 xin zhao build.

Ew...

Spelling & Grammar is bad.
Guide is way too short.
Inconsistency.
21/9/0 is inefficient, especially done this way.
Runes are not good.
You need to take Q or W first to jungle, E is his ganking ability at 3 or 4.
Frozen Mallet is troll when you have good access to red buff.
Youmuu's Ghostblade is core on Xin Zhao.
No Wriggle's Lantern or any form of Madred's.
Hextech Gunblade is unthinkably bad.
Exhaust is overkill, take Ghost.
Take Cloth Armor & 5 HP pots to jungle.
No talk about Three Talon Strike.
Bad strategy with E + ult. (unless they are already CC'ed, best to knock-up and THEN ult or they'll get away)

Blah blah blah downvote.

Que buen build arre loco :P