op01 english booster box One Piece Protector for OP-01 to OP-16 (01-02 Reprint) Display Case One card is included at random from a total of 6 types. OP-01 to OP-08 and EB-01

For one, Harmo cannot be Special Summoned from the Extra Deck , meaning that it can only be Pendulum Summoned from the Hand

Other instances have had several cards complete a full scene

Red-Eyes Baby Dragon X DARK Level 3 [ Dragon / Effect ] ATK 1200 DEF 700 When this card is destroyed by battle and sent to the GY: You can Special Summon 1 Level 7 or lower "Red-Eyes" monster from your Deck, and if you do, equip this card from the GY to it

One of the reasons Magic: The Gathering holds its position as one of the best card games ever developed is due to its ability to take the lore of a thing and represent it through card mechanics that mirror that lore

I learned all of this from BDM

Skill Drain also prevents the Dragon Rulers from returning to hand during the End Phase, is difficult for the opponent to deal with without their Monster Effects