Black can struggle with card draw, so having a way to get extra cards into your hand is appreciated
It can also be rather conspicuous and hard to pull off in decks that want to tap out each turn
At the current box price, thats ~648,000 spent on average to pull one meaning the cards 448,000 market price actually represents a discount versus pulling it yourself
While shutting down the Grapeshot kill from Storm and the Scapeshift / Valakut, the Molten Pinnacle kill from TitanShift is nice, Amulet of Safekeeping is also surprisingly effective as Burn hate, where every Lava Spike and Lightning Bolt costing an additional mana slows the deck down significantly
Land fetchers are vitally important because they help to ensure that you have enough lands and that they are of the right colors
Trample Whenever Grim Flayer deals combat damage to a player, look at the top three cards of your library