how to tell if a card is graded What Do the Different Grades Mean? How to Grade Pokemon Cards

Untapping an attacking creature doesn't remove it from combat

If a cards value is driven by utility rather than collectibility, the price may drop quickly if it is replaced in the meta or if tournament rules change

During my research I also found that most cards (Like Pokemon) are a 1:2 aspect ratio

You can check out all of these mechanics in Duskmourn: House of Horror

The Mikanko monsters all have 0 ATK and DEF, but their stats can be quite deceiving from their true strength

Ral asked why Kylox was killed, and Oba answered that, while Krenko had been the actual target of Kylox's assassin, he was not free from blame, because he had planned to steal Phyrexian designs for his own devices