theres actually a couple design flaws, which leads me to believe that the cards themselves were whipped up in a short notice
Black Lotus in particular holds the record for the highest sale price of any MTG card
For example, if you discard a card to cast Tormenting Voice, then copy it with Reverberate, you do not need to discard and additional card for the copy, since you're not casting it
As one of the original Power Nine cards, it is considered a pinnacle of rarity and would certainly be an essential addition to any serious collector's gathering
As CBR's own Nnamdi Ezekwe pointed out at the time of the new cards' release, "[they] generally seem to possess lower HP and cheaper energy costs for moves, with a potentially positive impact on gameplay speed." However, the more important thing that the company did at the time was reveal its first full trailer for the new app
Any green land that enters the battlefield tapped suffers from the problem that it cant cast a mana creature on turn 1, but thats less important in current Standard than it generally has been in the past thanks to Sylvan Caryatid and the fact that Elvish Mystic is the only mana creature that costs G