NetCode: Add Ghost to Collection without Prefab?

I'm using NetCode and I have a ghost that I'd like the server to generate on initialization for terrain rendering. I could create a dummy prefab for this ghost and add it to the collection on my "Ghost Collection Authoring Component" but I think it's overkill to force entity conversion when it's not necessary: my system does all the work and doesn't require this overhead. I could potentially have many of these semi-stateless environmental systems for presentation - and I want the server to decide which ones are active at any time.

So, can I create ghost definitions programmatically at runtime? How or why not?

 

Is the terrain moving? Why do you need ghosts?

 

It was only rendering on the server, regardless which UpdateInGroup I assigned to it. I guess I'm reaching for solutions here making it a ghost, I want it to render on both the host and clients.

Also I might enable it to send and receive RPC calls.