Most of these effects being black they find themselves in the same deck as the baloth, not opposing it still rendering it pretty ineffective
Where they do excel is in any deck with these colors that is looking to add some card advantage and some life loss to your foes
Smaller stores might also be selective, taking only cards they know will sell and passing on bulk or heavily played cards
Top Commanders The Ur-Dragon Rank #1 49,171decks Edgar Markov Rank #2 48,861decks Y'shtola, Night's Blessed Rank #3 48,109decks Atraxa, Praetors' Voice Rank #4 43,126decks Krenko, Mob Boss Rank #5 42,559decks Kaalia of the Vast Rank #6 38,349decks Vivi Ornitier Rank #7 36,777decks Ms
Before Ravnica: City of Guilds first introduced shocklands in all their versatile and graceful glory, non-basic lands were the last piece of the deck-building errand