BreadMan
Terrarian
Having a method of having potion effects last indefinetely would increase quality of life greatly, I think it should probably be either a consumable (perhaps via shimmering some other item), an accesory, or even an item that is active while in the inventory. In case it was an accesory, it could be post moon lord, crafted with all potions and lunar fragments or something else. And if it is was consumable obtained via shimmer it should be obtainable post moon lord too, and having UI for choosing with buff is currently active would be cool. This kind of item would be highly useful for people that like to build for long periods of time, fishing, or farming enemies, as it would allow the player to constantly have the necessary buffs for these tasks without having to drink potions constantly, it would make afk farming a lot easier.