You completed a Heroic Strike. You earned Strange Coins. With those earned Strange Coins u can buy weapons from Xûr. Now tell me why i did not earn it. And the fact that u get your weapons from any game mode in the game has to do with luck, Pure RNG luck! Some people just are not that lucky. I really don't give f[b]u[/b]ck about what Xûr sells. If u have the coins to buy an item u want, u deserved it and earned it period.