Is there any way to do this?

I already have a framework in place for spawning the mobs, I just want to know if there is an easy way to do this automatically when the player enters a given chunk (that is, the one containing my custom structure.)

I'll see if I can get that to work.

I'm having a hard time getting the event to fire. I've registered it with MinecraftForge.EVENT_BUS and properly annotated its method, what do you think the problem is?

 

Edit: Now it's firing, but how do I get a hold of the server-side world object?

Okay, I've got it working.