That would help get higher cost cards like Basil (Disguised Detective), Tadashi Hamada (Baymax Inventor), and Yokai (Scientific Supervillain) into play, and Yokai is especially deadly, as you can play Microbots for free and then gain additional cards after questing depending on the cards in your opponents play area
Explore means you're potentially dumping all sorts of cards in your graveyard anyway, and Return to the Ranks gives you a handy way to bring these to the battlefield in bulk
Meowscarada EX is the best evolution for Sprigatito, with its ability putting three damage counters on your opponent's Pokemon in exchange for a Grass energy in your hand, but this can be taken further
Its the most popular and most powerful mono-black commander for a reason
The hypergeometric distribution models drawing without replacement from a finite population, which is exactly how MTG works once you draw a card, it leaves your library