About the Name Darkrai is known in lore as the "Pitch-Black Pokmon" a Mythical Darkness-type that haunts dreams and cloaks itself in an aura of pure shadow
The pull odds tell the story: one Master Ball mirror per box, 153 possible cards, meaning you need roughly 153 boxes (~6.3 million / ~$43,000) to statistically expect one Gengar
Four mana for a 1/1 Warrior token, even with vigilance, isnt a good rate without token doublers on board (or, you know, abilities that can give those tokens extra keywords)
All of these are worth varying amounts of money and really complicate this cards price
Its an amazing card-draw engine for anything that cares about the graveyard, and the character has become a fan favorite over the years
The chance of getting the rarest cards The rarer the card, the less likely it is to find the card in your booster