Your right. I forgot about the chaperone quest because I did it week 1. Still though, last word has a year 2 version and was also sold by Xur so many times. You still have so many ways to obtain the year 2 version via 3 of coins or the exotic chest drops. Pocket infinity was locked away by a exotic bounty which was completely RNG based. I never was able to obtain that bounty because the only 3 I ever received were thorn, bad juju, and invective. Yes xur sells legacy engrams ehhh who the -blam!- am i kidding of course bungie would lock an exotic behind another exotic.