Your search for "Voidslime 388" revealed the following:
Voidslime - Retro Frame (Foil) (RVR) from Ravnica Remastered, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Isis Card Text:Counter target spell, activated ability, or triggered ability.
Voidslime - Retro Frame (RVR) from Ravnica Remastered, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Isis Card Text:Counter target spell, activated ability, or triggered ability.
Voidslime - Champs and States Promos (Foil) (PCMP) from Champs and States Promos, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Jim Murray Card Text:Counter target spell, activated ability, or triggered ability.