The only thing that keeps this down in the honorable mention section is that the Telepathy can really give you heat in multiplayer as people don't like that player and will target them for removal
The set introduces the SWORD trait with aggressive gameplay strategies, and Charlotte Pudding has become essential for Big Mom Pirates builds in the competitive meta
Where prices really spike is when cards appeal to both groups, with a card like Sheoldred, The Apocalypse a prime example being a major player in multiple competitive formats, and a favourite in Commander
At the time, it became the most expensive Pokmon card in the world
Whether its saying (or screaming) certain words (as seen in some of the previous entries) so that an ability triggers or can be activated or having to do some kind of physical interaction with your card, Un-sets are very fond of these kinds of mechanics
For some reason, with Odyssey , we made a whole bunch of swaps