When passing the forgotten shores, at the pass to reach the level ?? enemies, you will see a level 8 shank and reaver vandal. This vandal drops 25 glimmer and occasionally a banner which gets you 200 glimmer and 100 cryptarc xp at the tower and even a chest spawns nearby but if your a lower level I highly recommend bringing a friend as the vandal has lots of health and damage. There is also another chest on a rock hitting the water very close by so there is even more glimmer. Happy hunting guardians!