I know there has been speculation on the way to unlock it, from just another WvW mastery line to some sort of rank requirement/collection completion. However, has anyone speculated about if it will have a cost to use? Like while you're in WvW, what are the odds that it's gonna cost 10 supply to mount up every time? It just seems unlikely that they would add essentially a siege weapon that increases your move speed, and is capable of taking gates down, usable entirely for free. Thoughts?