The reason of writing these article series is to present cards that are generic budget staples, that are good in almost every deck of the given color. These are the best budget picks according to popularity. Cards that cost above 20$ won’t be included is this guide as they cannot be considered budget staples. Keep in mind that this article is only meant to be a helping deckbuilding tool. For greater efficiency, synergy and greater budget options you should not always run generic options but specific ones to your deck/commander/strategy.
Data for the most commonly played cards and their prices come from EDHREC site.
Of course, the guide will be constantly updated when new or older cards can make an entry or change tier (according to budget) and If you like to propose some other great budget staples you can let me know in the comments below!