Like with all collectible cards, quality is key
I think the lack of ability text helps it
Blake's article on the Lost Legends promotion has a full list of the cards from the original Legends set that can be opened inside
The visual tell: distinct artwork you recognize as different from the card you know, with a standard border (unlike the borderless Secret Rare)
Imagine one of these decks on the play, especially in a Temples-rich field like Standard, where many of the opponent's lands will be entering the battlefield tapped: One of the things that is particularly prickly about a deck that directly exploits the Philosophy of Fire and its teachings is that it is very difficult for opponents to interact with, defensively
Land Color tag templates(None) Jetmir's Garden ( : Add , , or .) This land enters tapped