It's not a coincidence and its not generally how they come - "bewear" my friends
These often arent intended to be so format-wrapping and eventually get caught up in a banned & restricted announcement a few months after release
The Dominaria United Commander Decks includes 1 ready-to-play deck of 100 Magic cards (2 traditional foil legendary cards, 98 nonfoil cards), a 2-card Collector Booster Sample Pack, 1 foil-etched Display Commander (a thick cardstock copy of the commander card with foil etched into the cards border and art), 10 double-sided tokens, 1 deck box (can hold 100 sleeved cards), 1 Life Wheel, 1 strategy insert, and 1 reference card
The effect of My Tendrils Run Deep that allows you to play an additional land is cumulative with similar effects
Managorger Hydra naturally grows since it counts the spells from all your opponents, so you dont need to go deep on spell casting and cantrips