There are 9 commons (37.5%), 14 uncommons (29.2%), 21 rares (27.3%), and 9 mythic rares (6%) that can be found in this slot
However, as the player bringing Hokori to the party, you're able to plan accordingly, filling your deck with alternative means of creating mana, namely in the form of artifacts
Oddly enough, the two characters on the front of this box have very little to do with this decks strongest plays
And its incidentally the most popular typal Commander in the format (and the most popular in the last few months by far!)
Paper Approx
I wouldnt tunnel in on Grixis too early, but if you are drafting blue/red and havent seen any good payoffs, consider picking black removal and going the Grixis direction