PS4 Mimics

[D3stoy3r_Z]

I can't create Biome Mimics

 

[Dapling]

The chest you put the key in must have the key be the ONLY thing in there and there must only be one key.

 

[Unit One]

I can't create Biome Mimics

Two things to check - are you in hardmode, and do you have Autopause turned off.