At the beginning of your end step, if you haven't cast a spell from your hand this turn and Inventive Wingsmith doesn't have a flying (This creature can't be blocked except by creatures with flying or reach.) counter on it, put a flying (This creature can't be blocked except by creatures with flying or reach.) counter on it.
The information presented on this site about Magic: The Gathering, both literal and graphical, is copyrighted by Wizards of the Coast.
This website is not produced, endorsed, supported, or affiliated with Wizards of the Coast.