Rakdos, the Muscle Theft decks built on Threaten effects often employ sacrifice outlets to steal an opponent's creature, attack with it, and then get rid of it before control changes again
If the target opponent is an illegal target by the time Ox Drover's last ability tries to resolve, it won't resolve
It was an experiment in creating a 'pack-cracking experience' rather than a draft-optimised product, and it split the player base between those who loved the bonus slots and those who found the randomness frustrating
It certainly doesn't seem like the deck has picked up any new tools recently
Once you get your spells going, Yshtola offers a reasonable drain effect, which, in an unusual twist, actually damages your opponents
One of the fairer feeling cards of this ilk but still ultimately not one that leads to great gaming experiences