While 40 is the minimum, you should aim to play 40 cards the vast majority of the time to make your deck perform more consistently
Out With the Old Providing a mix of flavor and value, the above cards are hardly bad pulls from a Set Booster
Explorer Explorer is a non-rotating format that can be described as an MTGA version of Pioneer
however, the five non-Saga The Brothers' War Commander cards from Set Boosters, plus the two mythic rares from Set Boosters and the mythic rare legendary cards from The Brothers' War Commander decks do appear in foil in Collector Boosters
It exiles instead of destroys, and the siphoning of life is the cherry on top
The mana cost RRRUUU plays into the higher end, while Dragon Wizard cannot be countered, he is not immune to destruction spells