Your search for "Sapphire Medallion 407" revealed the following:
Sapphire Medallion (MH3) from Modern Horizons 3, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Daniel Ljunggren Card Text:Blue spells you cast cost 1 less to cast.
Sapphire Medallion (CMM) from Commander Masters, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Daniel Ljunggren Card Text:Blue spells you cast cost 1 less to cast.
Sapphire Medallion (Foil) (MH3) from Modern Horizons 3, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Daniel Ljunggren Card Text:Blue spells you cast cost 1 less to cast.
Sapphire Medallion (Foil) (CMM) from Commander Masters, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Daniel Ljunggren Card Text:Blue spells you cast cost 1 less to cast.