I had an idea for a new card. It would be at least a 6 star card or higher.
Card would be called: Changeling
The card would have open attribute/ ability where the player would assign an attribute to the card.
Another way to give this card varied abilities would be to equip the card with an amulet. Colored amulets would have different abilities.
Amulet?s power would decrease during battles and need to be replenished.