This idea has already been suggested and declined by the owners as there is an alternative option implemented on-site which enables anyone to possibly gain new cards by salvaging their duplicate cards. You can find a similar topic and their answer here : https://worldofpotter.userecho.com/communities/1/topics/554-trade-chocolate-frogs-cards. It still would be pretty cool to have a new trading wizard/dragon/other cards function, but it's likely not an option that would be considered nor added to the sites in the future.
Ideas
This idea has already been suggested and declined by the owners as there is an alternative option implemented on-site which enables anyone to possibly gain new cards by salvaging their duplicate cards. You can find a similar topic and their answer here : https://worldofpotter.userecho.com/communities/1/topics/554-trade-chocolate-frogs-cards. It still would be pretty cool to have a new trading wizard/dragon/other cards function, but it's likely not an option that would be considered nor added to the sites in the future.