Originally Posted by
lordofthepit
I hate messing up the manabase, but I found that a maindeck Karakas is very much worth it. If you have a Knight in hand, absolutely do not try to cast it (it might get countered), unless for some reason you are trying to bait them (i.e. you have a second Knight). Against Show and Tell -> Emrakul, it's like running five Force of Wills (4 Knights + Karakas), except it can't get countered by their own FoWs, it doesn't require you to pitch a card, and you get to dump your own fatty into play.
I actually find the matchup to be slightly favorable (unless they're running Sneak Attack and manage to get that in quickly enough). Progenitus is stil a problem if they get it out early though.