You Can Now Wield A Sword In Destiny’s Patrol Mode
It looks like Bungie gave players a minor sneak peak into the Dark Below DLC which will arrive soon on all platforms.
This “easter egg” may be encountered in Destiny’s patrol mode in Old Russia or the Moon. All you have to do is search for a Hive Knight called Blade of Crota and kill it. When it dies it will drop his sword and you may pick it up and wield it for a short time in order to cut your opponents.
You can watch video footage of this being done below: