Rakdos, Patron of Chaos was released in the Murders At Karlov Manor set and Rakdos, the Muscle came out in the Outlaws of Thunder Junction set
EachCommander MastersCommander Deck set includes 1 ready-to-play deck of 100 Magic cards (2 Traditional Foil Legendary Creature 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
O-Kagachi perished, the barrier between realms faded, and the stolen item came to life as Kyodai, the new kami of a unified Kamigawa
The most expensive card in this set is the Mewtwo VSTAR Full Art Rainbow Holo #79/78
For more on what to expect when opening Japanese packs for the first time, this walkthrough from the official Pokmon YouTube channel is a great starting point