Seems like I can never consistently have one to pair with my Exotic Energy Weapon loadouts. The current options, Toil and Trouble and Long Shadow have a lot of undesirable or outdated perk combinations too.
On a side note, I feel there should also be a way to change the seasonal legendary weapons to either Kinetic or Energy so we can have more loadout diversity and flexibility.
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Don't worry they will re issue the old stuff soon so you can grind for it again.