If you choose not to put the nonland permanent card you reveal onto the battlefield, you'll put it on the bottom of your library with the other cards
Sylvan Library (green, 2 mana): Three cards per turn, with a life-payment trade-off
After extensive research by CGC, including conducting an infrared test, UV test, and X-ray fluorescence (XRF) spectrometer test, all of the chemical elements, most notably calcium, titanium, iron, copper and zinc, all correspond with a normal 1999 Base Set card
Since opponents will kill these things on sight, its good to have multiple cards that can do the same thing
It often removes two or three permanents when it comes into play, and its pretty easy to maximize ETB triggers with effects like Panharmonicon and Displacer Kitten
Precious Trolley lets you search your deck for any number of basic Pokmon and add them to your bench