They called this invention - magic.

   poof! 

poof¹

po͝of,po͞of/

exclamation

1. 1. 

   used to convey the suddenness with which someone or something disappears.

   
   

   "once you've used it, poof—it's gone."
2. 2. 

   used to express contemptuous dismissal.

   
   

   "“Oh, poof!” said Will. “You say that every year you foolish moronic idiot.”"