That's almost prohibitively high with cards that seek to use mana for their discard engine-ing, such as Compulsion
The starter decks above have everything you need to play the game: 60 cards, damage counters, a paper play mat (you dont NEED it, but its useful), and a lore tracker
As we saw with Battle for Zendikar s Part the Waterveil, any extra turn effect that gives you a creature to attack with is an asset to a Taking Turns deck
Cards like The Queen, Commanding Presence and Gaston, Intellectual Powerhouse are about as tricky as things get, but they simply do what they say on the card and get players used to the powerful (at least in my eyes) shift mechanic, which is a cost reduction method
Otherwise, you can cast these cards for free
Speaking of combos, the idea of this deck is to get Mindsplice Apparatus on the battlefield for enough turns to get it up to three counters so the cost of all of our instant and sorcery spells is reduced by three