Knowledge Pool 2.0 costs four less mana and allows you to cast without having to do a weird dance of navigating a casting maze to play what you want
If the triggered ability doesn't resolve (due to being countered with Stifle, for example, or if all its targets have become illegal), the cycling ability will still resolve and you'll draw a card
2013-09-15 When you scry, you may put all the cards you look at back on top of your library, you may put all of those cards on the bottom of your library, or you may put some of those cards on top and the rest of them on the bottom
They synergize since you can make first sweep later and keep them around
Wurmcoil Engine Wurmcoil Engine is difficult to ignore once it hits the battlefield
But its not likely backgrounds and choose a background will get any support or new cards outside of D&D-related products, which puts a bit of a damper on things