Quote from Pokken »The black sideboard cards are much better than the white ones for the most part, so I see no issue trying that at least.
Gonna have to disagree with this statement right here. Path to Exile, Selfless Spirit, Kataki, BFT, Linvala, Reveillark, Stony Silence, and Qasali Pridemage are staple cards that have been in the Sideboard and Maybeboard since this deck was created.
Comparing that to black you've got Abrupt Decay and Pharika.
White is and has always been far more pervasive in our sideboards. Claiming that the black cards are better is simply not true. White cards are AT LEAST as good AND more plentiful.