Other than being a little hench, you can pay X and one Black mana to put an Artifact or Creature from an opponents graveyard into play, and then that player mills X cards
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Creatures (32) 2 Jarad, Golgari Lich Lord 3 Lotleth Troll 2 Deathrite Shaman 4 Elvish Mystic 2 Shadowborn Demon 4 Sylvan Caryatid 4 Nighthowler 4 Nemesis of Mortals 3 Herald of Torment 4 Satyr Wayfinder Lands (20) Spells (8) Sideboard Lastly (at least for this article), Temple of Malady also opens up the opportunity for BUG decks to operate more effectively
It can also be done at instant speed, letting you activate it during blocks to ensure creatures survive combat and take out what they're blocking
Almost any Magic player has at least one favorite bad card art, if not many
Spearing Determining how many lands one has to play in MTG decks can vary between many factors like mana curve, mana requirement, and format