MK (Marks) Any and all cards with writing, ink marks, pencil marks, etc
For Yuna in particular, it kind of made sense for her to bring someone back from the graveyard, and we were working on trying to make some cool cards for Standard that would be really fun for a green-white reanimator deck with summons like Bahamut or Titan, Verhey said
The texture patterns on authentic rare cards create specific light-catching effects under bright light
Odds are that while everyone may not have had this card, those that did probably had no idea it would hold any value since it is one of the less common starter evolutions
On top of that, there are a hundred different ways to play E-Heroes (as they're commonly called): you could be up against a Neos variant, or one using Evil Heroes, or Masked Heroes