Xur does not sell gjallarhorn and ppl do not let you run Crota without it. So if you do not have gjallarhorn you get kicked from Crota, and you cannot buy it by Xur - I have 121 Strange Coins and had so many always the last 2 months - 31 days+ game time with 3 char - all 32 - multiple armor - VOG Gear - Crota Gear - 2 Vex - 2 Hunger Crota - doesn't matter - no gjallarhorn - they kick you from Raids - just for that - you do not even get to play...