I was patrolling Earth yesterday, collecting Spinmetal and going through the missions, when I came across 4 or 5 Guardians, Level 20+, stood in the same location shooting what seemed like an empty cave. I joined in for a few minutes and when I went into the cave the floor was covered in Engrams. I have one Legendary piece of armour and two Legendary weapons, through playing strikes and patrols etc. and they suddenly seem pretty meaningless when after a few hours shooting a cave, someone can be loaded out with Legendary armour and weapons. I hope something is done about this soon, as it takes a lot of the fun out of the game. Well this obviously isn't a problem for the majority of people. For those asking about the location of the cave: Go to the building where the Fallen and the Hive are fighting each other, up the steps and through the room where the Captain is and exit the building there and you'll find the cave. Just look for the group of Guardians shooting at it.