Winter Blast can target tapped creatures. If they have flying, the second part of the effect will still affect them.
2007-09-16
Checks if the creatures are Flying on resolution and not on announcement. It’s not a targeting restriction.
Legalitet:
Standard: Ej legal
Pioneer: Ej legal
Modern: Ej legal
Legacy: Legal
Vintage: Legal
EDH / Commander: Legal
Pauper: Ej legal
Explorer: Ej legal
Historic: Ej legal
Brawl: Ej legal
Premodern: Legal
93/94: Ej legal