the mod changes the tarot cards and the emf tier 3 the spirit box tier 1 and 3 the ouija board too 
Go on steam and right click on Phasmophobia > Browse local files
Go in the `Phasmophobia_Data` folder
Make a backup of the `sharedassets1.assets` file in case the mod breaks your game.
Open the compressed file you downloaded
Copy the `sharedassets1.assets` file and paste it into your `Phasmophobia_Data` folder. (Replace existing file when asked)
Enjoy!