Dark Ritual allows black so many sick turn one plays, it isn't funny
For many players, MTG cards are used for Commander nights, drafts, casual games, and competitive events
Thanks to the prevalence of exile-based removal and board wipes, Hivelord definitely isnt unbeatable
For the cost of two mana plus a sacrificed creature, this instant is game-changing if used at the right time to counter a big board wipe, and given the creature/enchantment focus of this deck, this is invaluable.
But we already can tell just how important its going to be for the game going forward, and practically every deck will want to at least pack a few
You still need to abide by Commander rules, but to prevent limitations in deck builds, there are some workarounds implemented