None of them is legacy compliant... For tutoring purpose, several cards are available, but less eficient :
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grim tutor, just costs $200...
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infernal tutor, but for good tutoring you have to cast it with a way to drop your hand or hands free
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diabolic intent, you have to scrifice a creature
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diabolic tutor, cost 2BB
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spoils of the vault, big life loss
- a few more I think
You have an interesting list of black tutors here
http://www.mtgsalvation.com/forums/the-game/commander-edh/198657-the-comprehensive-guide-to-black-tutors-primer(careful, it's for EDH, not legacy, take a look to the gatherer if your are interested in a card)