Last friday I finally got enough motes the day Xur came to buy an exotic helmet engram (im level 30 warlock) I was planning on dismantling it to get the needed shard to upgrade my Light Beyond Nemesis which I had fallen in love with. I got the obsidian mind. My friends told me to keep it, but I felt like the nova bomb perk wouldn't be fantastic, so I dismantled it and got the needed shard. Later that day, after a very painful nightfall, I got the Obsidian Mind AGAIN, and I dismantled it because I needed a shard for my ice breaker. Now on the forums, I'm reading that the OM is a fantastic helmet and you can practically spam nova bombs with it. Did I make a huge mistake?