Strangely, only one other creature makes it into the top ten, and it does something way different, but well get there later
Regular Updates (Regulation Marks) Most important for play: Each card has a regulation/legality marker (a letter in the lower left corner) that indicates which sets the card comes from and which cards are legal in the official TCG game
As it is a song, it can be sung by any character with the exception of the 1 costs The Queen Regal Monarch and Owl Logical Lecturer
4 Ursula - Sea Witch Queen 208/204, Amethyst It's a bit of a shame that Ursula doesn't manage to top her own themed Ursula's Return expansion in value, but she comes close enough to it
It takes some time to get the proxies, at least in the States
(2018-07-13) Nicol Bolas, the Arisen has a color indicator on its typeline