Hello!
I am working on to get the Achievement Undersea Usurper done, but I am having trouble to know when Mrrl is going to sell the mount. There are no indicators or anything other than the brief description “sells it for a few days once a month”.
It’s up pretty often, but it’s kind of random as far as I know, and I don’t know if there is a way to check it or not. Just check every day, I’ve seen it being sold at least a dozen times.
Also, just to make sure you don’t make the same mistake I did: are you using the benthic cloak that reveals the murloc vendors “hidden” inventory?