You dont need to worry about the enters trigger on Cloudblazer or deal with the first activation of a Griselbrand when you can just fire off a Counterspell or Force of Will to prevent them from hitting the board at all
They add a card that shuts down their own plan, then decide graveyard hate is bad. If you rely on your own graveyard (reanimator, aristocrats, delve, flashback, recursion commanders), prioritize: Targeted exile effects (pick off key threats) One-shot nukes that you can time (hit them, then keep playing) Effects that do not blanket-exile everything forever If you do not use your graveyard much, you can play the heavier continuous pieces with fewer downsides
Forcing everyone else to have just one dork is pretty rough to get past
With how big libraries are in Commander, you are going to need the extra help, and Bruvac helps get your opponents to zero cards much quicker
Treat them as such
I think it's got a shot at winning some games, but I'm also aware that some players react very negatively to mill