You dont want the table to have the ability to answer you when it comes time to cast Emrakul, the Promised End or swing out with an army of Scute Swarms
-10: Add ten mana of any one color
Bolass Citadel Bolass Citadel is a card that will make the table immediately move to code red upon resolution
Not too far behind are cards like Pride Sovereign, which can get absurdly strong in cat typal decks, or Angel of Condemnation, essentially a repeatable Oblivion Ring on a stick
If you add Brave the Sands to your list, your entire attacking force can pull double duty as blockers, as well as being able to attack before casting your commander for her alternate cost
There is a Bant Control deck that takes full advantage of Teferi, Time Raveler and Oko, Thief of Crowns that Ive been working on