Your search for "molten-core maestro 335" revealed the following:
Molten-Core Maestro - Extended Art (Foil) (SOS) from Secrets of Strixhaven, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Aleksi Briclot Card Text:MenaceOpus — Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this...
Molten-Core Maestro - Extended Art (SOS) from Secrets of Strixhaven, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Aleksi Briclot Card Text:MenaceOpus — Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature....