Some internet speculation is Venture Into the Dungeon is a lesson like effect for dungeons that start in another zone, but if so I don't think it will be the side board, because otherwise this would make it useless in Commander and Brawl
The nature of the leader system also lends One Piece Card Game another layer of strategy, as your leader will frequently need to pop in and out of safety to do battle themselves, not unlike Magic: The Gatherings Commander format
While this probably sounds intimidating, and more so if you aren't a math person, it's actually pretty easy, especially with the help of a hypergeometric calculator, which does all of the hard work for us
Despite being an Elf tribal deck, it also packs a few (unnecessary) surprises in its Creature list
The Sword entry explains that this is because its mouth leads directly into the afterlife , instead of to its body
Each pack has 7 cards, which will include 1 Basic land card (or non-foil borderless scene card), 3 Uncommon cards, 1 Rare (or mythic rare) card, 1 Traditional foil card (uncommon or higher), and 1 Showcase card (which may also be foil)