Making things die is what mono-black does best
Its a simpler line, but any reanimation that doesnt already grant haste becomes away better, as suggested by the decks inclusion of Beacon of Unrest and From Under the Floorboards
Magic: The Gathering is all about taking whatever you can find and turning it into something potent enough to let you survive, and with the coming of Fallout in the next Universes Beyond crossover, the planeswalkers of the multiverse will soon be able to call upon the survivors and technology of what used to be called America
We can do huge damage by building him up big and throwing him alone at the enemy in just one piercing blow
Standard also has two other creatures with this exact mana cost: Craterhoof Behemoth and Ghalta, Stampede Tyrant, which are much more proactive threats
This legend isnt that strong outside of some cool synergies, though