A link to what I can do with Merits

Where do I find one? Can someone post a link, ie, unlock costume pieces at the tailor, get other stuff, and so on and so forth.

Please and thank you.

Firstly, you probably want to post questions for other players in the Player Question section in the future.

Secondly, I've always found the Paragon Wiki an invaluable source for all things CoX-related.

Hope this helps