I want to have the WCC explode when it gets crushed, but I cant seem to get the env_explosion to work when its parented to the WCC. A func_physbox brush doesnt seem to follow the WCC either.

Is there a way to get the entity to move to a certain location, where the WCC is, and then explode?

If you used a func_physbox, it would make more sense to parent the cube TO that, THEN parent the explosion to the physbox.

I have found that parented objects can sometimes be problematic with regards to portals.

I had a model parented to a func_physbox in one of my maps. When I went through a portal, the physbox went through, but the model just vanished

This problem may have been specific to the setup I had, but it is something you may want check for.

Turn your prop_physics into a prop_physics_override. There's some explosions settings in here, that shows up when broken.

More importantly, func_physboxes get totally ruined when used with portals. Your best bet is to stay away from them at all costs.

None of the objects were going thru portals... just being moved around normally.

Make the WCC a physics_override gave me all the functionality I needed

Now I just have to make it so that its easier to get the cube thru the portal without blowing up.