You can get away with only sleeving the scenarios, hero cards, and then only the cards in active decks that works well
If a player's deck is just not built around their commander, but everyone else is playing a deck that is highly dependent upon having their commander on the field, they'll be free to play Drannith whenever they like because they don't mind having their commander unavailable to them
You're also getting multiple popular Black cards that are essential for other Black control decks
I remember getting in line, a ChannelFireball pro got in behind me, and they had something like 300 cards
But this wasnt just any Black Lotus, it is part of the limited-edition Alpha set, which was the very first printing of Magic cards ever made and received the highest possible grading from Professional Sports Authenticator (PSA 10)