Specifically, getting benefits for several attacking creatures
While its generally better to find a card you can cast immediately after tutoring so your opponents have less time to plan around you, sometimes the threat of a board wipe like Damnation or a counterspell like Cryptic Command will convince opponents to play a little more cautiously, giving you more time to set up for an even bigger play down the road
As with the other uncommons on this list, Im in for a set at current retail
Monastery Siege, Frontier Siege, Yasova Dragonclaw, Return to the Earth, Atarka, World Render, Orc Sureshot, and Sage-Eye Avengers and were all in my Top 20, but they were pulled out for various reasons