Slickshot Lockpicker 

Creature — Human Rogue
When this creature enters, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)
Plot {2}{U} (You may pay {2}{U} and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)
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Cards that do something similar expected a card that isn't here?
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Snapcaster Mage 100%
$18.87#1448
"When this creature enters, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost."
Chancellor of the Spires 88%
$0.40#13685
"When this creature enters, you may cast target instant or sorcery card from an opponent's graveyard without paying its mana cost."
Impulsivity 88%
$0.28#6414
"When this creature enters, you may cast target instant or sorcery card from a graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead."
Scholar of the Lost Trove 85%
$0.28#10197
"When this creature enters, you may cast target instant, sorcery, or artifact card from your graveyard without paying its mana cost. If an instant or sorcery spell cast this way would be put into your graveyard, exile it instead."
Songcrafter Mage 84%
$0.21#12774
"When this creature enters, target instant or sorcery card in your graveyard gains harmonize until end of turn. Its harmonize cost is equal to its mana cost."