Control decks already want to hold up mana every turn for countermagic
This is some great flavor for Hildibrand Manderville, who is essentially a Final Fantasy 14 comic relief character
The Cauldron exiles a key creature from a graveyard, usually Vivi Ornitier, and grants its activated abilities to all of your creatures with +1/+1 counters
The Nazgul is a special card, letting you play with up to nine copies of it in your deck, and as a special treat, there are nine different artworks for Nazgul, each one depicting a different human king who fell to the temptations of Sauron
I love the lore and the design of this game, even if its terribly messy at times, and I dont want to sacrifice them just to have a few non-players buy cards to make a big company money