Spawning of enemies?

I'm wanting to make a little sandbox with slimes that move about, eat, and reproduce.

Is there any way to create a new entity at runtime? Seems like the Launch Nodon is the only way to introduce new objects. If this is the case I guess I'd have to make a pool of possible slimes to teleport in/out of the simulation as they die or spawn.

Not a great solution because making an object pool of 10 slimes would mean any change to behavior must be repeated 10 times.

I'd love to have a sort Launch Nodon that can take another object as input, which it then makes a copy of.