In decks that often find themselves with small hand sizes, Kricketune V can be a great boost to the decks draw power
Mind Crush This nostalgic trap lets you destroy a card in your opponents hand, if you can remember the name of the card
The thing that pushes this to a level above cards like Impulse for me is that you can put things back into your deck and that is something not many cards in magic allow for, certainly not in such a cheap and painless way as this (except of course Brainstorm...)
These very small sets are purchased in bundles of 35 booster packs (known as BOOster Bundles) for a surprisingly low price
Actual times may vary based on submission volume
Bumbleflower: Mana Drain: And Rhystic Study, but the card is more than a year since release, so keep that in mind: For almost all of these, we can see that the price starts out high, and then takes a dip, and then rises into the stratosphere