As skins of other cards, these Dracula cards are perfectly legal in every format in which those cards are legal
The Black Lotus was one of the earliest Magic: The Gathering cards
Like Cascade, Discover lets you exile cards from the top of your library until you find one you are able to cast, but there are three big differences between Cascade and Discover
Drawing inspiration from legendary storm strategies, RogSi prioritizes mana advantage over traditional card advantage, leveraging explosive starts and consistent access to the formats most broken cards
In short, this land is destined to be a few bucks, foils even more
Green Ramp is sorely lacking a two-drop spell or creature to go along with Rattleclaw Mystic to have the consistency it needs