The skeletal spotlight shines this time on:
Action Comics Weekly #631 cover
"Boooooooo! Aaaaargghh! I am a skeeeeery skuuuuulll!
Criminals, look upon me and tremble, for I am DOOM!"
The Phantom Stranger's correspondance course in ventriloquism really wasn't helping him terrify the criminals so much as entertain them. But, it kept them out of trouble for awhile, so he figured, what the heck.
Besides, the kids loved it at Halloween.