Guild Wars 2

Where can you get this?

http://www.guildhead.com/item/32258/wardens-greatsword

Info on Guildhead is obtained through datamining. Unfortunately, GW2 has lots of unimplemented items, including the item you linked.

Judging by the icon it would appear to be the same skin as the sylvari cultural tier 3 greatsword. Which is very much obtainable from a vendor in the grove, just at lvl 80 and rare.