Opponents won't lose life even if you control eight or more artifacts
Being Mono-Black isnt ideal in terms of color access for Aristocrats, but you still get most of the good support pieces
If you played during Khans of Tarkir, this set is like a reunion with old friends (except now, those friends have even more firepower and zero chill)
If youre going to face a particular danger multiple times every game (say, a big creatures) then you want to have answers consistently 10-20 creatures of your own, or targeted removal, etc
People argue that it would be a safe unban because there are better wincons available in Commander, and you still need five colors of mana and cast an 8-mana spell
Every time you do this you leave yourself U