We also have a full list of the promo cards here, a searchable card database here, and a simple Lorcana card list too
Deviate from it if you feel like your deck needs fewer or more lands, for example
16 Toxrill, The Corrosive A Serious Threat With Little Escape Printed in Innistrad: Crimson Vow alongside Umbris, while Toxrill, the Corrosive may cost a hefty seven mana, once cast it is capable of single-handedly taking over a Commander game
Two copies of Dragon Fire from a dwindling Set 1 are a bonus and Mauis Fish Hook is seeing inclusion in early drafts for Set 4 Ruby/Amethyst decks
Too long the format was about fast non-interactive decks like Eldrazi, Phoenix or Hogaak
A maximum of one nonbanding creature can join an attacking band no matter how many creatures with banding are in it