With the passing of TTK, I think this should be moved with the rest of the upgrades, or only be used on upgrading TTK specific loot. It's kind of a pain to upgrade the new stuff that needs it. Or the cost for upgrades should be closer to 2 than 5 to even out the time it takes to collect, in comparison to the other materials. Or give Eris a 350 wormspore ghost. Or let us trade in hadium flakes 5 for 7 (to account for the chest double drop chance). Bottom line, it's a pain when you get gear that needs wormspore. I'm guessing it's a bigger pain for newcomers that don't have a small stash of it saved up. Then decrease the eris faction boost, to account for the new abundance.