Origin
One evening Maisie witnessed a falling meteorite land nearby her house, being an avid Jewelry maker she searched out the Meteorite and broke off a piece, deciding to make it into a Brooch
The next day Maisie learned that if the Brooch was glowing everything she said would actually happen, whether an inadvertently made off-hand comment or not, but the power would randomly come and go.
Creation
Maisie was created for the Girl’s comic Sally, appearing right from the first issue. After Sally was cancelled and merged with Tammy the character lived on in that comic.