That means that they are a variant of a standard card from this or another set, featuring alternate art and foil treatments, and as such theyre numbered above the sets number of unique cards
As usual, spells that can be and often are free are almost always problematic
Finding these rares in your collection of bulk can be rather thrilling, even netting you a pretty penny if youre lucky
The same goes for any other cards on the restricted list
It begs for RNG manipulation (Look at that, we got two Lilypad Mew!) There might be a timing trick to it as the coin spins in front of you, though I cant pull it off consistently
Notably, this Selesnya Dino legend can be cheated into play as early as turn one(!) with the three-mana planeswalker Sorin, Imperious Bloodlords -3 ability, because in addition to being a Dino, its also a Vampire