Could be called "pixie
dust" and
may also be known as "fairy
dust", it is a fictional substance. It is a trail of sparkling material that often follows mythical creatures such as pixies and fairies in general when they are visually represented. Sometimes, this trail is interpreted as being a tangible substance, often imbued with magic powers.
Taken to normal realms of human existence, one could use it to describe bringing forth
help from the ethereal, or heavenly spirit, to cause something humanly impossible to happen.