The only thing we can think of is that perhaps Hakbal was considered quite similar to Kumena, Tyrant of Orazca, an already popular Merfolk commander
But, with cards like Bojuka Bog or Relic of Progenitus, you can filter out graveyards to turn Balthor into a net positive
Here are the rarities from left to right: Common, Uncommon, Rare, Mythic, Masterpiece
This card allows you to blink a creature whenever anyone cycles a card, and coupled with powerful ETB creatures like Flametongue Kavu or Mulldrifter you can get a huge resource advantage
Which of these decks appeals to you
So if you want a unique Mono Black Artifacts deck that leans heavily on grindy Graveyard strategies, then Necron Dynasties is the deck for you