After digging through all of these different mill cards, trying to understand how they have contextually changed we must turn to the final question: what will we be using Bruvac the Grandiloquent for
Vein Drinker [Vampire]: From Shards of Alara
I learned this the hard way years ago when my first Dragon deck looked powerful on paper, but stalled every game because the commander did not support the tribe properly
Kenrith, the Returned King If Queen Marchesa is a good commander for a theme deck around knights, then Kenrith, the Returned King is the perfect commander for it
Its cheap cost makes it powerful, but its sorcery speed leaves the tutored card vulnerable to mill or shuffle effects before you have an opportunity to draw it
If an ability triggers "whenever you tap" something for mana and produces mana, that triggered mana ability won't be affected by Nyxbloom Ancient