In many ways it is the opposite to Sphinx's Revelation, instead of paying mana and gaining life you lose life and pay no mana
Black is usually fond of gaining power at any cost, but Braids is more of the This is gonna hurt you a lot more than it's gonna hurt me type of black card
March of the Multitudes I remember when March of the Multitudes was the core of a powerful Standard deck, and it deserves recognition in Commander as well
This is already true almost all of the time, but if you manage to engineer a game state involving Floral Spuzzem and R&D's Secret Lair, you'll be glad you have this
Spells like Big Score, Unexpected Windfall, and Deadly Dispute let you trade cards or creatures for more mana and cards, which helps you dig through your deck while you build up Treasures
This is to increase the reward of buying boosters and make opening packs more exciting