It would actually be cool if you unlock Thunderlord 2.0 and somewhere down the line or a certain Gunsmith Rank Banshee summons you. He tells you that the Creators of the Thunderlord have asked him to build a better version. Do some random Item Quests and Kills and Material farms and the end reward is "The Lord" its a Heavy LMG that can switch between all 3 Elements. Arc stats and perks are same as Thunder Solar is statted to "Against All Odds" so its a really slow but high impact weapon and its Final Perk is Firefly or possibly a type of Burning attack. Void is a medium fire, Mostly fully balanced weapon but its final Perk is High Chance of Stunning Enemies or Slowing them, not sure what would be better. Edit: Void would be the lowest LMG but Highest rate of Fire. So you have all 3 Types of LMG Fire Rates and Impacts in one gun. There can also be a cool down between switching Elements and Ammo loss...unlike Murmur so that way its no OP.