Hearthpwn

God

Due to the recent patch modifying copy mechanics, i wanted to know if now Cho gives altered spell copies to the opponent, so i tried sending a spell-damage + mana-cost modified spell* to my opponent to see if he got a buffed copy.
*Greater Arcane Missiles generated by Primordial Glyph, cost also reduced with Sorcerer's Apprentice and Spell Damage increased by Bloodmage Thalnos.

Short answer: He did not.

Long answer: There are 4 zones in the game: Deck, Hand, Board and Graveyard. With the current changes, any copy that travels respectively in that direction will retain the buff. It will also be retained if it stays in the zone, eg Hand to Hand: Azalina Soulthief.
At first sight it might seem confusing if the spell travels from Hand to Hand, or from Board to Hand. It actually is considered in Board when casted, thus won't keep the alterations because the copy would be flowing "against the tide", from Board to Hand.

*flies away back to reddit*

His attack sound is my favorite

How does this work with Echo? Will he give ghost versions? Will the ghost versions in your opponents hand disappear at the end of your turn? 

He gives the ghost versions, but they disappear from the enemy's hand at the end of your turn. Too bad, mill rogue would really appreciate that after losing Coldlight Oracle.

i like to try Lorewalker Cho in Book of Specters deck... 

minion mage will not have much spells so i guess Lorewalker Cho can be good in that deck...

but we have to try it to say it will be good or not...

Cho works well in Spiteful Summoner decks.  You don't have low end spells anyway so he forces removal if you can get him out early.  

A golden one is so beautiful. Im a collector and one day i will craft a golden version of Lorewalker.

Here's my new favorite.

I am thinking to craft this card, hoping it might help these decks; exodia mage, handbuff paladin, mill rogue.

If anyone had experience, would like to hear...

Overall, it makes a deck marginally less competitive and way more fun. Craft it or not based on that.

It's lots of fun in mill rogue. Great to have out when you play Sap and Vanish.

I can't speak to handbuff paladin. As far as exodia mage goes...I'm not sure. I've tried it once or twice, but I don't really have the cards to make exodia mage work well, and I was playing an odd variation where I tried to lock down the board with duplicate Lorewalkers and duplicate Demented Frostcallers.

It's best when you can get out multiple copies of it. It's tempting to try to build around it completely, which tends not to work because of the games where you don't draw it. I'm moving it in and out of my decks all the time based on how competitive or how build-around I'm feeling. 

It can also work well with OTK priest (buff the lorewalker's health bigger and bigger until you play Inner Fire on it).

It works okay in aggro decks too. Sort of a mini-Loatheb to discourage your opponent from playing spells once you have board dominance.

It's pretty good in weapon's rogue, where you can pass your opponent a lot of cards that they can't play unless they have a weapon. (Although, playing that against Warrior is rather like playing Millhouse Manastorm against Mage...no, just no.)

It's remarkably good in secret hunter. If you can get out both the Lorewalker and a Secretkeeper early on, you usually win. (Your opponent either has the option to have their hand blocked up with secrets or else to play them back and buff your Secretkeeper. And you can see which secret your opponent has played by mousing over it.)

lul

When thinking about disenchanting this card or not, check out wowhobbs' games. He showed me how fun this card can be, and I'm actually thinking of crafting one for a Priest deck only because of him.

Crafted this guy the other day. Played only two games with him in my dragon warrior deck but both games were wins because of him giving me spells that helped me.

Such a fun card,but I'm not sure why he doesn't have an attack sound...

Is that sarcasm or are you genuinely being serious? 

A bit of both. His attack audio is so quiet it might as well not be there.

He's a somewhat under-rated card in the current meta, I mean I've run him in my Handbuff Paladin and he's actually carried quite a few of my matches.

This was the first legendary I ever got, and I've used it a lot. A lot of players don't seem to know how to respond, and stall for a few moves, giving me the chance to get ahead. Works particularly well if there are some taunts on your side with it.

I also often see the classic situation where my opponent plays a secret without thinking, I get a copy, take a look at it, and they concede in embarrassment.

Haha! Man, now I want to craft this card. Getting a free spell or two from the other side would rock. I know it'd be super rare, but imagine playing this on turn 1 with a druid and extra mana, then the other guy playing their quest. How crazy would that be to quest steal?