Well of Lost Dreams ($3.77) and Dawn of Hope ($0.55) let you pay to draw whenever you gain, and Alhammarrets Archive ($10.55) doubles both your lifegain and your card draw
Control decks might have played a copy or two when it was legal in Standard, since instant-speed card draw is always at a premium in control decks, but it's still just a random uncommon and fairly close to replacement level
So, which of your pulls should you be double-sleeving, and how much is too much for that one missing card in your master set
Choose from: Blame Game : Goad Your Foes Identify Suspects play the Blame Game with upgrades Deadly Disguise : Disguise Cards Big Surprises the Deadly Disguise upgrades are here Deep Clue Sea : Clue Tokens Card Advantage and look up these upgrades for Deep Clue Sea Revanant Recon : Surveil Resurrect Creatures and check out some Revanant Recon upgrades TRACK THE CLUES
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Until end of turn, you may cast those cards without paying their mana costs