While tinkering around in Terraria, I discovered a flaw in the Biome Mimic AI, which allowed me to make the worlds first fully AFK Biome Mimic farm that doesn't require the Player to die for it to work, using only pre-Hardmode resources. With this farm you can gain a significant boost when entering Hardmode, as it will provide you with an infinite supply of Biome Mimic loot, Souls of Light/Night, and money.
![](https://i.ytimg.com/vi/9VU1qmRUSbI/maxresdefault.jpg)