Major Pokmon TCG releases (new expansions, special collections, holiday sets) create demand surges
Illustrated by Misuhiro Arita
Flesh Duplicate Flesh Duplicate is awesome in decks that want to Clone their own creatures for cheap, either because they have strong ETB effects or because youre copying legendary creatures like Keiga, the Tide Star that you actively want to die
Notably, removal spells on Thassas Oracle wouldn't stop it, as the trigger is independent of the creature and would still win the game
While it doesn't really impact the value of the cards, it makes it easier when it comes to finding out which cards are the best ones to chase, because most players will have some idea of a Pokemon's value
Every card you cast becomes a 2-for-1, quickly generating card value with overwhelming power