Since Destiny is supposedly going to be Bungie's greatest game, it is only natural that players be allowed to wield the greatest piece if technology ever created by Bungie: the Armor Lock.
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...I can see it now, everyone in the fireteam is a Titan, and the biggest baddest boss anyone in the game has ever seen comes out from his hidey hole, and launches a giant attack. They all armor lock, and the attack is reflected back at the boss, and since it hit three different individuals, and it was so big, it does three times the amount of damage it would have if it only hit one armor locking person. this means, the boss is now almost dead. easiest boss fight in history.