Each one of them has either a clause that prevents multiple copies from being activated per turn, or an effect designed in such way that they can't be used in every single Deck, like "Pot of Greed" could, or even in the same Deck, as the effects of "Pot of Desires" and "Pot of Prosperity" conflict with each other
During the End Phase, if this card is in the GY because it was destroyed on the field by battle or card effect and sent there this turn: You can Special Summon 1 "Rokket" monster from your Deck, except "Autorokket Dragon"
At least until its reprint in "Ghosts From the Past: The 2nd Haunting" on May 5th
6 Risebell The Summoner This story begins with "Risebell" and his sister "Saambell" having fun outside while "Hypnosister" and "Trancefamiliar" watch them from the bushes
Cyberdarkness Dragon X DARK Level 10 [ Machine / FusionEffect ] ATK 2000 DEF 2000 5 "Cyberdark" Effect Monsters Must first be Fusion Summoned
The main shared effect of the "Bystial" monsters require the user to banish the targeted card in the GY to be Summoned successfully