LogFAQs > #900045422

Ways of obtaining a UW off the top of my head:

* Bought with 30000 Arena Points (27000 if you have Gladi). You can get ~5-6k points a week even with a bad team

* Crafted with 1000 UW Shards. You get 250 shards for every UW you grind (I.e. ones you don't want). Up to 4000 shards can be obtained from League of Honor achievements. Sometimes from World Boss chests (you get 2 a day). Very infrequently from Challenge Raids.

* 1x Random UW Ticket given out on login bonus Day 16 of every month

* Newbie Log-in bonuses gives out a Random UW Ticket plus a UW Ticket selector iirc.

* Login bonuses for total number of days logged in. I forget the exact pattern but they show up every now and again

* Random UW Tickets can be obtained from World Boss chests (like 1-3% per chest iirc and you get 2 a day)

* Occasionally they give them out for random reasons (Facebook like campaigns, etc.) or have events where you do X/Y/Z and obtain them

* The Gacha system

So they can't really be grinded hardcore as they are semi-gated like in the Arena but you definitely should be acquiring them at a decent rate. After 83 days I've acquired 18 UW's and have 2 UW Selectors sat in my inventory plus enough Arena points to buy 2x UW's too. So basically 22 UW's in 83 days and I'm sat on 20k Rubies right now so not like I blew my rubies to get them either.