(Imagine, for example, if Kaladesh had done this: if we had an energy Commander deck, you would definitely want a couple energy cards from the main set also in your deck.) These decks are a blast to play and spiritually feel just like Commander decks of years past
Brago is also notably a Spirit which means he benefits from Essence Flux and other Spirit tribal cards, many of which have powerful enter the battlefield effects
As long as youre dealing that damage, youre gaining either forced sacrifices or tokens
Its rare for a whole set (or mini-set, I should say) of cards to start moving in a positive direction after release, so when it does happen its certainly worth taking a deeper dive
Its reactionary, a lot like MTG Game Changer Consecrated Sphinx, but unlike the infamous flier, Unagi of Kiyoshi Island is a legendary creature, allowing you to play it in the Command Zone
Just having Bilbo around helps you immensely in your lifegain synergies