On my latest playthrough, I started a rod of discord farm before I had defeated Plantera. I spent hours AFK grinding in the underground hallow, in which I had gotten over a dozen wizard hats, tons of magic quivers and armor polish, half a dozen rune sets, over a thousand granite blocks (because that granite biome nearby didn't want to go away no matter how hard I tried), two dozen yoyos, another dozen blessed apples, a bone pickaxe,
two slime staffs, and a ton of other stuff that I'm too lazy to list, but not one rod of discord. Then, today,
long after I finished the lunar event, I thought, "Hey! Why not go back to that RoD farm and see if I get it?" At the same time, I was writing out a post on another forum, so instead of watching the screen full-time, I only kept checking the game every two minutes or so to kill all the enchanted swords flying around me. So right when I was almost done with my post, and I went back to check the game again-
RNG pls