A good reason for going mono-black is that black can cover almost all bases well (except artifact destruction)
Like I often do, I kept that in mind as I worked on the set, hoping to find a solution
Never underestimate any way to get card advantage or filtering in PDH, and never underestimate anything with a big ol knife
There are also obvious perks like the ability to turn the self discard into a positive thing
She is driven to slay the Primeval owl named Coro by both a dream of freeing her people from his tyranny and a personal vendetta founded in an emotional loss - as such, it felt appropriate to philosophically represent her with the colors White (community-focused) and Red (freedom-loving, emotionally-driven)
The point is, Vampire Nighthawk terrorized aggro decks early on in original Zendikar and immortally threatens the battlefield with power crept versions like Qarsi Revenant