Sometimes you have to look past a cards rarity and power. Even if a card seems worthless, there is always some way you can use it, but you have to try look for that in the card. Consider this, an old spell card called "Secret Passage to the Treasures" is an old common card, but if you use it right it can be very powerful. Combo it with cards like "Speed Warrior" and "Injection Fairy Lily" to bring out it's potential and deal some massive damage. The possibilitys are limitless with any card. "Secret Pass to the Treasures", for those of you who don't know, lets a monster with 1000 ATK or less attack your opponent directly the turn you activate it. "Injection Fairy Lily" has only 400 ATK, so she is compatable with the card, and her ability activates during the damage step, so with this combo you deal 3400 points of damage without destroying any monsters! Never judge a book by it's cover. Even if it looks shabby and weak, that doesn't mean theres no power to be found.