These can be from the same set or mix-and-matched across your favorites
But an Obzedat's Aid recursion would work once, and then a Bojuka Bog once, and such, you want this to be recursion
Awaken the Woods slots into pretty much every land-based Commander deck, like Lord Windgrace and Obuun, Mul Daya Ancestor
Each 20-card half-deck is designed to be mixed and matched to make various 40-card starter decks
All you really have to do is avoid anything with global land destruction, no repeatable extra turns, dont intentionally get any 2-card infinite combos, and you cant have any game changer cards
+1: You and target opponent each draw a card