Being able to pump them up with Daring Mechanic and Reckless Velocitaur or give them keywords with Lotusguard Disciple and Canyon Vaulter will help you maintain the aggression even if the opponent starts to build up a board
For example, Destined // Lead is a green and black card, it is both an instant card and a sorcery card, and its mana value is 6
Most decks, by practical necessity if anything else, are going to be a mixture of the above approaches
While the English release of the game nerfed some stronger cards compared to the Japanese version to try making the game more balanced, this wasn't enough
For example, the planeswalker frame defaults to three loyalty abilities and no room for a typical static ability, and you cant adjust that as far as I can tell
While their image cannot be corroborated, they posted a picture of dozens of Umbreon VMAX alternate art cards next to an equally stacked pile of Rayquaza alt arts, captioned, It probably happened with [Evolving Skies], too. That Umbreon sells for around 400, and Rayquaza around 250