The Strixhaven: A Curriculum of Chaos sourcebook is a bit lighter when it comes to character creation with just one new race, but you also get to pick your college, a Strixhaven background, some new feats, spells, and magic items
We have a fair bit of artifact tutors like Inventors' Fair, Fabricate, Whir of Invention, and Tezzeret the Seeker
You can boast any time after the declare attackers step as long as you attacked with a creature with boast
You can choose a mode even if some or all players will be entirely or partially unaffected
Its powerful as both an attacker and a blocker, and being indestructible makes it somewhat difficult to remove
Daily rewards are the foundation for the Mastery System, which in turn entices players to play more often to get more stuff