Hero collection cards are not the favorite of collecters but there are some cool cards inside: platina cards!
There are 48 platina cards. These dragon ball cards have a metalic mirror effect with different stamped border in each part.
You can find these cards in hero collection part 2-3-4 in japanese version ! (and 16/40 of them in part 4 US artbox version)
Platina cards is kinda a collection inside a collection !
These cards are not avaible in “artbox” usa edition.