In order to do that, he loves to draw from low-angle shots, playing with lights and shadows, adding a lot of contrast and a unique color palette to his cards
From what I could find, the Grand Prix cards are about 26x36 foam boards and are available in different languages
The Koraidon card, in particular, uses the same pose and composition as the Full Art Koraidon EX card, only now with a shiny golden finish
(It's also not an enchantment they can kill to get their dork back, by the way) But by discarding it for an effect, you net the effect as well as a powerful madness theft of something at instant speed that can change the tables very quickly
The primary combo is using Solemnity alongside Nine Lives or Phyrexian Unlife to keep yourself alive, but it also pairs well with a non-human, Phyrexian Altar and Mikaeus, the Unhallowed for infinite mana