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Making your commander stronger makes it more effective in combat and harder to remove with damage
Then, whenever that player loses the game, you gain life and draw cards equal to the number of spite counters on it
Drop a Red Creatures divider in your storage box, slide your red creature cards behind it, and you can find any specific card in seconds instead of fanning the whole deck
There are a bunch of cards between those and around $100, ranging from The Abyss to Field of Dreams, and Acid Rain
Artifacts can be even harder to remove, and aggressive decks can punish black quickly, especially when its spending life to fuel its game plan