How do you get the Reign of Order Icon?
Riot's description in the client reads: “Never Released”
Is the Reign of Order Icon still available?
Riot does not list the Reign of Order Icon as a legacy icon.

Reign of Order Icon is a 2017 League of Legends summoner icon from the Versus set (9 of 29). Its icon ID is 1669.
Riot's description in the client reads: “Never Released”
Riot does not list the Reign of Order Icon as a legacy icon.