mtg cards like rhystic study Altered Art Friends teach what you want to know Rhystic Study (Judge Promo) –

each Commander Deck contains: 1 ready-to-play deck of 100 Magic cards in Surge Foil treatment 2 card Collector Booster Sample Pack 10 double-sided tokens in 3 of the decks

Dominaria United Set Boosters contain all the great cards from the main set that you could want and an opportunity for Dominaria United Commander cards or cards from The List , with more opportunities of getting multiple rares or mythic rares than Draft Boosters

It won't consider any cards in your sideboard, so those cards don't have to follow the deck-building rule

I think the extra utility on this cycle effect slightly outperforms the ETB trigger of its counterpart