Emet-Selch, Unsundered / Hades, Sorcerer of Eld Emet-Selch, Unsundered has the potential to be the best commander in the set, at least with sheer power
That means you can throw in a couple of big old cards into the mix, Commander is where those seven-mana do-nothing enchantment cards that get printed come into their own
Rattlechains Its hard to rank typal enablers, but Rattlechains is an absolutely key card in spirits decks, protecting and then enabling flash for 2 mana
This is one of the strengths of WOTC R&D, and I hope we see more updates and adjustments like this on other obsolete mechanics in the future!
In game, the card allows the player to sacrifice the card when it is in play to generate three managame resources used to cast spells (play cards from the hand)