The value of X is calculated only once, as Heidegger's first ability resolves
There are so many examples of passive card draw, and these types of effects dominated in the First Chapter metagame because they were often a better payoff than their active cousins (and there were less active ones at the time)
A Japanese Exclusive This Force of Negation is already absurdly rare for MTG standards, but its going to be even more difficult to get for American players
Theres also no guarantee that this is the only Japanese exclusive treatment for the Final Fantasy MTG set
Each one is crafted to showcase the best elements of the FINAL FANTASY franchise, and we look forward to sharing more of these cards over the coming weeks
A new rainbow foiling process proved to be a huge hit, and the general darker theming of the set is probably the closest we'll get to an out-and-out horror set, and this really saw creativity flow for utterly gorgeous card designs