How to Get Destiny 2 Royal Executioner Fusion Rifle. Royal Executioner is a Solar energy, Adaptive frame Fusion Rifle. The Royal Executioner Fusion Rifle you can get after completing the “Awaken, Queensguard” mission, which is part of the seasonal questline. After that, you’ll get access to the War Table in the H.E.L.M. and all seasonal weapons. Now you can start collecting them and their patterns. Here are all methods you can use to obtain any of the six seasonal weapons, including the Prodigal Return: 1) Defiant Battlegrounds activity located in the H.E.L.M 2) Decoding Defiant engrams at the War Table in the H.E.L.M 3)War Table Reputation Rewards