Criminality
Terrarian
Jungle Key <------> Desert Key
Corruption Key <------> Crimson Key
Hallowed Key -------> Your world's evil key
Frozen Key -------> Hallowed Key
The transformations can be changeable as seen fit.
This would simply make it nicer so you don't have to grind to get a different 1/2500 (0.04%) key.
Instead of Shimmering a biome key to change it into a biome chest. The new recipe would just be a normal chest and a biome key.
Corruption Key <------> Crimson Key
Hallowed Key -------> Your world's evil key
Frozen Key -------> Hallowed Key
The transformations can be changeable as seen fit.
This would simply make it nicer so you don't have to grind to get a different 1/2500 (0.04%) key.
Instead of Shimmering a biome key to change it into a biome chest. The new recipe would just be a normal chest and a biome key.