No. Stop. writeToNbt and readFromNbt are for saving to disk. Server-side. If you want to sync stuff to the client (assuming you want to use the vanilla mechanic, which uses NBT), you need to override a couple of methods (warning, this is a giant mess): getUpdateTag - Returns the data that should be sent to the client on initial chunk load (i.e. when it gets into render distance, etc.). Call super here and put whatever data you need to have available on the client in the NBTTagCompound retu
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