Next up is My Gallery, which shows your card creations, and even has a tab where you can order custom proxied versions of your cards (through MTG Proxy)
Being a sorcery is far less of a drawback when it can be played for just one mana
Honorable Mentions: Timetwister & Ancestral Recall As members of the Power Nine the strongest Magic spells ever printed (think of The Avengers , but for MTG cards) Timetwister and Ancestral Recall are so powerful that they're off the charts
Secondly, a lot of folks out there aren't comfortable with the idea of exiling stuff from their library
Extra turn spells are also a good inclusion since this allows you to flip more coins, and because its game-winning ability triggers on your upkeep
All this is a little academic, when you do imprint stuff it gives you a vast tempo boost and when you don't you still have a card which you can put to use