Protector of Cantha..

Hello guys.
I have really having troubles getting Protector of Cantha title.
I've done every mission I have on my Map + I've done the local and foreign quarter of Vizunah Square... But it keeps saying 12/13
Now my friend told me that i have to do a luxon side mission to get the title but i am kurzick.. I have no idea how to get there and what should i do..
I'd really hate to leave the guild and join another to do a mission.. =/
Please help.

You're missing Gyala Hatchery, the Luxon mission equivalent of Eternal Grove.

You only need 10k unspent Luxon faction to access it, just like you need 10k unspent Kurzick faction for Eternal Grove. You can do sidequests for Luxon NPCs to get that faction. There's also vanquishing to get the faction you want if you've got HM unlocked. You can also JQ or FA for the faction if you want. None of them require you to leave your Kurzick guild.

glacialphoenix has summed it up pretty nicely, the only thing I'll add is that in order to get access to Cavalon (the Luxon equivalent of House zu Heltzer), you need to return to Maatu Keep and take the quest "Journey to Cavalon" from Jamei. After that quest, you'll be asked to come up with 10k Luxon faction.

Also, since it's important to get across I'm repeating it - there is absolutely no need to leave your guild. You can acquire Luxon faction (and turn in rewards for Luxon faction) while in a Kurzick guild.

Like glacial said, It' pretty much easy. You can mingle with luxons or kurzicks and it doesn't matter your alignment. How do you think some of the guildless people play out there?

i had the same problem but reversed since i'm a luxon but it didn't take me long to notice my book was missing a chapter, so all i had to do was wiki and fill it in.