What are the shiny cards for

[trainra]

i don't know

 

[RikuOfDarkness]

They are Premium cards. I think it just means they are stronger, not sure though.

They are broken when used even when not in a sleight.

 

[soras_destiny55]

premium card are special bonuses that you get in packs or in premium rooms. they cost less to put in your deck, which makes them good for a powerful bonus used only once, as they disappear when theyre used. this makes them a ideal choice for someone needing a quick boost.

 

[LightoftheDark]

They are Premium cards. They cost less CP to put in your deck, but they disappear after the first time you use them.