This spell isn't modal. When it resolves, it will destroy the target if it's a creature or an artifact, even if it changed from one to the other between targeting and resolution.
Legalitet:
Standard: Ej legal
Pioneer: Legal
Modern: Legal
Legacy: Legal
Vintage: Legal
EDH / Commander: Legal
Pauper: Ej legal
Explorer: Ej legal
Historic: Legal
Brawl: Ej legal
Premodern: Ej legal
93/94: Ej legal
Putrefy är Legal i dessa block: Ravnica, Return to Ravnica