How to combine objects without losing specific properties I want to create a bunch of Marbles, each has three colored blades inside. The blades are connected to a Color Ramp and Random Node, the orb has its own node setup.

How can I combine these objects without losing the effects I get from the nodes? Joining gives the blades just one color, parenting does not copy the blades when creating instances.
The best way to do this, is to put the four objects into a Collection.
You can duplicate the Collection or use it in a Particle System. Select Collection >Whole Collection to make sure that all the objects stay together as one.