Where Elesh falls down is against creature light decks where she isn't often having a significant enough impact when you play her to be all that
that type of card (if Spell or Trap) cannot be activated, or (if Monster) cannot activate its effects, until the end of your opponent's next turn
Black has specific cards it wants to play for specific power levels and win conditions
Its "Wrathful Hearth" ability deals 20 damage for each damage counter on the defending Pokmon, while its "Dynamic Blaze" attack can deal a massive 140 damage and even more if the defending Pokmon is an Evolution
Her original art, on the other hand, reveals that the bandages are stained with blood
Though mono-coloured commanders (or at least, mono-colour and colorless) are less common, if you do have a deck thats going to be based primarily around White cards, you may well be able to build yourself a nicely thematic deck with one of the below though Im willing to wager that were not likely to see many players opting for Bill the Pony as their Commander card