You can cast a nonland card with flash any time you could cast an instant.
2012-05-01
The last ability applies to nonland cards in any zone, provided something is allowing you to cast them. For example, you could cast a sorcery with flashback as though it had flash.
Legalitet:
Standard: Ej legal
Pioneer: Ej legal
Modern: Legal
Legacy: Legal
Vintage: Legal
EDH / Commander: Legal
Pauper: Ej legal
Explorer: Ej legal
Historic: Ej legal
Brawl: Ej legal
Premodern: Ej legal
93/94: Ej legal
Alchemist's Refuge är Legal i dessa block: Innistrad