Originally Posted by
huygee
The "virtual card advantage" theory that gets people so excited about SDT takes into account the many shuffle effects available in legacy. Presumably, with a 1 mana investment each turn, you can always draw something useful, and then shuffle into a new top 3 when that's no longer the case. I've also seen CB decks with Bob that were able to use SDT effectively to draw the extra cards for free. Obviously, SDT isn't THAT powerful by itself, but I've definitely been on the receiving end of a beating orchestrated by an unanswered SDT.
However, I believe there are a couple of reasons that UW Tempo can ignore SDT more than other decks: 1) real card advantage, and 2) the 1 mana activation cost can start to seem really expensive when you're wasting all their lands with wayfarer.
With that understanding (not that I'm saying that it's correct), would it be worth it to FOW a sylvan library?