Garland, Knight of Cornelia/Chaos, the Endless
Card draw is one of the most useful things as the more cards in hand, the better decisions you can make and, of course, the sooner your most powerful cards are in your possession
I might be wrongthree-mana planeswalkers are always worth considering, and Tezzerator players are rightly excited about thisbut the 1RB mana cost is rough, the tokens cant attack, and the -1 ability doesnt provide any card advantage unless you want the artifact to be sacrificed for some reason
That can be combined with sacrifice fodder, tokens, Blood Artist-type cards, you name it
As Ive said before, Edge of Eternities is an incredible limited setbut what really makes it shine for Commander players is its overlap with rotating cards and the sweet reprints that come with it
One or both faces of a double-faced card may include a reminder about what's on the other face