Can’t seem to find a definite answer for this…
2 points
@lorty Good question. Have a look at the Version History section of https://wiki.guildwars2.com/wiki/Warclaw
A single visit to WvW will unlock it providing you own Janthir Wilds and either PoF or HoT.
3 points
You do not, it is unlocked via the story for JW.
1 point
think not, you`ll get it from JW story.