If you prefer to have flexibility in your removal, Generous Gift is the weapon of choice for you
You might choose a commander who interacts uniquely with lands, like Soul of Windgrace, or Titania, Protector of Argoth
Summoners Grimoire is a bit less exciting, but its still a nice way to cheat out big Summons
This is a nasty addition to those decks as well a reason to push into those colors and a great Five-Color format win con too
The only black based decks which dont play Thoughtseize at all in Modern are highly synergistic decks like Goblins or Mill, or decks which cant afford to play it due to other restrictions like Living End
That said, there are some real gems within the set for Commander, and included among them is Lavinia of the Tenth