Astolfo, Charlemagne's Paladin

{u}{u}: Astolfo, Charlemagne's Paladin gains
Hexproof until end of turn.
{2}{w}{u}: Create a legendary 4/4 white Hippogriff creature token with flying.
Whenever Astolfo attacks, if you control a hippogriff, Astolfo gains flying until end of turn.
"Show them your true power! Hippogriff!!"