There are a total of seven rarity levels, and they are easily identifiable if you know where to look
These will definitely see plenty of play in Commander since the formats slow enough to allow the time to capitalize on them, and I imagine Midgar, City of Mako and Lindblum, Industrial Regency become Cube frequent fliers
We expect that these sets will provide a sort of final boss style showdown, to close the book on a chapter of the ongoing story, perhaps once or twice a year at most (and therefore wont be released to accompany every new Lorcana booster set)
The only downside to this card is the 9 ink required to play it, which could potentially lessen its usage as it can only be used very late in matches
The cost depends on your goals, style, and level of detail