In Christmastimes of dire need, young Billy has been granted the power by the holiday spirits to summon awesome seasonal forces at the utterance of a single word!:
A word which transforms him, in a flash, into that merriest of holiday beings...
House ad for Shazam (1973 series); printed in Justice League of America (1960 series) #103 (December 1972)
Ad art: pencils and inks by C. C. Beck
*Yes, the Christmas Zebra. Beloved striped equid of popular Christmas lore. What, you wanna argue with Christmas Marvel about it?