How to get the "A Rare Realm" Achievement !!!

[Douwd]

Create a new world with "getfixedboi" as seed and that's it !

[Lancenig]

I've been playing for quite some time in 2 different seeds and after the update I loaded in and got this achievement from one of the two worlds...wish I would have been paying better attention to know which one was special lol

[Ferry]

I think It works with any custom seed.

Since I always tend play with drunk worlds (having 2 evils is always a plus) I got it as soon as I loaded a new world.