@Qianfulong Lurking dragon?
没事 哈哈 你是中国人吗？I’m just learning 汉语 
I wrote out a reply but mustn’t have pressed Post… 
Predator is amazing - one of the coolest fights I’ve ever seen. The whole last third / second half of the film is Arnie vs. the Predator. I was blown away when I first saw it 
I think you’re on the right path regarding the flange / phase effects. I don’t think it’s really possible in the Engine itself; easier in a DAW. I know Steinberg have a Cubase LE (Light Edition) which should have basic plugin effects to get the result you’re after. You can find free plugins for it on the net as well. I don’t use any other DAW but I’m sure there will be other free versions out there. Whatever you use, you should be able to control how much flange / phase effect is applied over the course of the sound, writing it into the automation track.