No, a set's new Commander cards that come in preconstructed decks are not found in play boosters
You can then bounce Ghost Town for free and repeat the process as many times as youd like, generating infinite Landfall triggers
Honorable Mentions Anowon, the Ruin Thief Anowon, the Ruin Thief is a great card
This card has already done its job if you get even one land out of it, but its very likely that Deep Gnome Terramancer will stick around and net you multiple lands if there are green decks or color-intensive decks that might run fetchlands at the table
Azorius excels at control
Uncommon: Haru, Hidden Talent If you hadn't heard yet, Patrick Chapin absolutely broke this one, and broke it all down last week