Choose a combination of basic lands and multicolor lands that will help you cast the cards in your deck
Orzhov is overflowing with excellent reanimation spells: Unburial Rites, Dread Return, and Exhume are classics, and The Cauldron of Eternity and Debtors Knell will allow you to reanimate creatures repeatedly over multiple turns
Printing a 100-card Commander deck in full color at high DPI can drain an entire set of cartridges (approx
Counter Intelligence Where World Shaper is a sledgehammer, Counter Intelligence is a finely tuned machine
With prowess creatures or (then legal) Vivi Ornitier on the board, his mana generation let you churn through cantrips and create some huge threats - and when your opponent removed him, you could fireball them in the face
Theres the typical spot removal in things like Path to Exile and Swords to Plowshares, but also a few specific interactive pieces that are worth highlighting