Those cards can appear in randomised booster packs or in dedicated box sets depending on the release
Future Modern staples like Dragon's Rage Channeler that don't have the chops to make a big splash for a format like Commander won't be found here in my list, and vice versa, there are some powerhouses in the set for casual play that aren't going to be making a tournament format like Modern, Legacy, or Vintage
From here, you can start a new deck or customise an existing deck
A 3/3 deathtouch for three is a totally reasonable on-curve play for a midrange deck, and Isareth the Awakeners reanimation ability pushes it over the top for me
This one is pretty great, as it's not hard at all to get counters on this even without the adapt ability
In Commander, this card asks that you make extra land drops as often as possible to hasten Cosimas return