The use case is still (say it with me now!) Bruvac the Grandiloquent, but Lo and Li, Royal Advisors created a Petitioner commander with an aggressive angle
Ian Malcolm, Chaotician sees Jeff Goldblums beloved scientist forcing players to exile the top card of their library whenever they draw a second card on their turn, before allowing the controlling player to cast spells from any exiled cards using any mana type
Ultimate Completeness: A true 63/63 set means no cards are missing, saving you countless hours hunting for individual cards
(A copy of a permanent spell becomes a token.) Whenever an opponent casts an artifact, instant, or sorcery spell, counter that spell
Your artifacts will make your commander cheaper, you can draw cards with a small downside, and you can turn your artifacts into direct damage bombs