Time Aside from the classic throw all your cards in a pile method, it will take time to organise cards so that you can easily find them again
Helm of Possession is one that any deck can run, and similarly to Vedalken Shackles, offers a repeatable sacrifice outlet to steal things with
Ral, Storm Conduit should be high on the list of cards to include, but keep in mind that copying a spell with storm doesnt get you a storm trigger
We also realized that we had an opportunity to tweak the effect as Amonkhet was a block using -1/-1 counters
Boosters are fun for discovery, but Commander decks usually need specific cards
Turn it face up any time for its mana cost if its a creature card.) Whenever a permanent you control is turned face up, if its a creature, you may have it fight target creature you dont control