phantom nightmare yugioh booster box Yu-Gi-Oh: - YUGIOH PHANTOM NIGHTMARE BSTRS

That's playing ball with some of the rarest Pokmon and Magic: The Gathering cards

Card Q&A Q4708 Jun

All "Memento" monsters, barring "Combined Creation", have effects that can destroy a "Memento" monster(s) you control in order to do various other effects

Protection and Sacrifice While protection saves a creature from damage, enchanting, being blocked, or being targeted, protection cant save a creature from being sacrificed

My guess from my own experience is that the first two of those are remnants of an earlier draft that just got forgotten about, and the third is just an accident, unless they were trying to imply a dracula cape there