It may not really be an actual variation, since its misprinted, but I still think its worth mentioning here, considering most of these stamp variations are misprints to begin with
Saying "I'm turning your creature into a Fish" rolls off the tongue way easier than struggling to say Ichthyomorphosis
By sacrificing a different Zombie monster, its Quick Effect lets it gain attack points equal to that monster's original attack points for one turn during either player's turn
People just genuinely love Gengar, and that love has kept prices strong for years
That involves mapping the world for AR, teaching AR how to contextualize that map intelligently and creating AR as a shared experience for all
This card needed a reprint bad, and WotC seemed to know that when they chose to have it be the first card revealed in the set