You can give your opponents planeswalkers more loyalty, increase the number of +1/+1 counters on their creatures, or even just give them additional resource counters like oil counters
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
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
Each card also has a Move Cost - that's the cost in Ink you can pay to move a character to that location
Whenever you cast an Instant or a Sorcery, you get to create a 2/2 Blue Drake with flying
