MReyesG's board
From Destinypedia, the Destiny wiki
Several videos on youtube show it's called that. But I will put a Citation Needed on there as some of the things that are known about Destiny I can't find sources for.
Shit. Well I don't know what to tell you. I'd probably say that it's cause this is a "special" page. See there, top right? Maybe that blocks it from being linked to. Based on it redirecting to the board of whatever profile you're on it probably has something to do with a cookie. So I suppose you probably won't be able to do this, but I have to ask, why do you even want to link to your board in the first place?
crap, no. Uhhh... Special:UserBoard&user=MReyesG
Hmm... let's see.... did it work?
Just copy this: User:MReyesG. Boy I hope that didn't show up as code. In case it did, here's it in a way that it won't be turned into code: [User:MReyesG]. Just add another [ on either side. If you want it to say something other than User:MReyesG, put a | after the link, and type what you want to be seen after it. for example: [User:MReyesG|MReyesG] will only show MReyesG. And if this is all too complicated, you can simply switch off the "show as wikitext" option for your sig and whenever you sign something it'll show whatever you have typed in, but clicking any of it will link to your page. However, you won't be able to be as fancy with it. If you want to read the actual guide for how you code it so letters are all snazzy (this time I hope that coded) just go here.
You might consider adding a link to this page in the signature. If you have trouble with that, just unclick the "treat as wiki text" check box.