Providing fun and interesting build-arounds that help to keep the clock moving is one thing, but marrying that up with Commanders that allow the true Control players playstyle to shine through is inspired
Four mana for a 1/5 isnt amazing, but it does start placing counters immediately, and potentially drawing cards too
If you had a store where 10 people were playing Standard and you release a bunch of Commander product and 6 new people come and start playing Commander, its not surprising that some of the Standard players might make friends with the Commander players and want to play Commander with them, and that can shrink the Standard audience
Black I think the highlights in black come as cards that look and feel as if they were always in the old border, even though we know that to be untrue
Kaalia is has been among MTGs best commander decks for a long time because cheating mana costs is almost always broken, so with Kaalia you want the biggest, baddest creatures of the types you can find, like Avacyn, Angel of Hope or Vilis, Broker of Blood
Brawl Not Legal Vintage Legal Timeless Not Legal Commander Legal Pauper Legal Oathbreaker Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Drain Life: Cost reducers can be used to reduce the X part of the mana cost