If I happen to have Nissa's Chosen in play and it dies, then there are two relevant replacement effects: Stone of Erechs (that would exile it instead of letting it go to the graveyard), and Nissa's Chosens own replacement effect (that would tuck it back into my library)
To top things off, the flavor of this particular Secret Lair is brilliant
There are 6 Common cards, 1 Common or The List card (The List being special cards, usually reprints, the selection of which can change between sets), three Uncommon cards, 1 non-foil Wild Card (this can be anything from the main set that the booster is a part of), 1 Rare or Mythic Rare from the boosters set, 1 Foil card of any rarity, 1 Basic Land card and, finally, 1 non-playable card, which can be a token, play aide, ad card or art card
No, Yu-Gi-Oh