Welcome Boosters: Available in select local game stores, these should be free, small packs made to welcome new players to MTG.
Instead, you can engage in rudimentary battles against AI and other players, open packs by waiting for the timer or rushing it via Hourglass objects that you get your hands on by completing missions, and these tend to complete themselves just by you playing
Lurking evil cards are found in Duskmourn: House of Horror Play Boosters and Collector Boosters
However, in terms of pure power, I prefer running Imotekh the Stormlord as the commander
You often get a Treasure straight away, then Kellogg offers you a chain of steady value with the activated ability which effectively casts Mind Control, though only with Treasure