rules for building a mtg commander deck How to Build The Complete Beginner's Guide to

Wizards wants you to be able to play all the cards, and demanding ones like Corpsejack Menace and Lessons from Life go sour if you're missing a color

And blue card draw is just that: card draw in blue

In order to compete in the World Championship in this structure you must have placed top four in MPL, placed top four in the Challengers/Rivals League, won one of the seven tabletop or arena Mythic Championships, or won of the previous year's World Championship

there were some cards introduced in Whispers in the Well that benefit from a card leaving a players inkwell in a turn

Dragonmaster Outcast

I like playing with those that can turn into a dork after you can cast this, and then swing on a naked board with Gideon Jura or Sarkhan, the Dragonspeaker