I was thinking about these mods and how they seem to exclude the majority of exotics specifically because they have no mod slot. I remembered how Oppressive Darkness is an armor mod that put a different effect on our grenades, so why not an armor mod that adds an effect to our weapons? Please consider this for a future release, this season would've given incentive to use both Graviton Lance and Polaris Lance, but it unfortunately it seems they'll remain in the vault this upcoming season