This rarely happens to me. Had just given my puppy a bath and thought, I'll do one more strike before I go to bed. Did the Undying Mind and it was fun. I laughed because at the end I got a legendary engram. Oh well, I'll take it and get it decrypted. Bam! Light Beyond Nemesis for my warlock. Maybe not as good as Obsidian Mind but oh well. I sure was surprised!