Guide:Farming Biome Keys or Key Molds - Terraria Wiki
Just started playing Terraria, asked what this key is, my veteran friends reactions are priceless (according to them, less than 0.05% drop chance) : r/Terraria
I got crimson key pre-plantera !!!! : r/Terraria
4 Ways to Get Biome Keys in Terraria - wikiHow
Mobile - Help on Multi-Biome key AFK farm | Terraria Community Forums