After the success of the Land Destruction one, I wanted to get your opinions on the best looters and diggers in R/G. R/G combo has a hard time tutoring for pieces, so this is really the only option. The obvious ones are obvious, so try to think outside the box.
I actually didn't consider how busted Sylvan Library is with Abundance. The only down side is the later is a primary combo piece in my deck and anything that makes it look abuse-able doesn't help it stick around long enough to be used later.