A better practice for high-value cards: buy from reputable sources, compare to known authentic examples, and use non-destructive checks first
Like most Pokmon cards, the value of Dhelmise depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Unified Minds)
Such is the nature of deck building
X and Memory Berry focuses on either decking the opponent or securing a win on time after getting a Prize lead, by dragging up the opponent's non-attacking Bench sitters with Restructure/Inviting Trap and then keeping them locked in place by Sand Tomb, while Flygon lv
Khans allows you to exile the top card of your library and play it until the end of your turn, while Dragons allows you to deal one damage to any target when one of your creatures leaves the battlefield
Dragon type