When I ran a poll on X that received plenty of votes, the voters agreed with me
Plus, there's a clear optimal list too, as winning decklists seem to have less than 10 cards different between them
Foil cards have a metallic glossy effect on them, and all cards apart from Enchanted cards come in both formats
You could also pair amethyst with ruby which has a number of powerful characters and songs that banish opponents directly
Alternatively, you could play Sheriff of Nottingham, Corrupt Official with Simba, Fighting Prince - whose ability, Step Down or Fight, gives players the option to draw two cards and discard two cards whenever they banish another character in a challenge, or The Queen, Disguised Peddler, which allows you to tap it to discard a character to gain lore equal to the amount of lore that character can gain
This isnt the first time a combination of Lorcana cards has managed to go technically infinite