Certain division ranks of Strange Favor will unlock a reward from Xur at his Treasure Trove. If you reach rank 16, you can reset your Strange Favor to reset Xur's offerings. Unlike other reputation systems, you can only reset your Strange Favor five times per sea After defeating the final round, Xur will sometimes announce the start of a Lightning Round. There's some speculation online about how to activate the Lightning Round. Some think you need your whole team to guess the correct door for th...