1. The main problem with Knights into Karakas are as follows:
-Karakas doesn't stop Sneak Attack/Emrakul.
-Karakas doesn't stop Griselbrand from drawing his cards.
-Karakas gets rolled by Woodfall Primus
-Karakas loses to Hive Mind, Dream Halls, and Progenitus.
Not that stopping the Emrakul isn't huge, and not that it isn't just as important to stop Griselbody as Griselbargain. Knight combined with a Revoker/Needle shuts down Griselbrand. But Knight/Karakas isn't as catchall as it used to be.
2. I'm telling you guys. Add a Sylvan Safekeeper to your 60. Your RUG Delver matchup will jump 5-10% just because of all the games you don't lose to Submerge or burn stopping your Jitte dude from getting his first hit in.
EDIT: Also, Cavern of Souls on Humans is pretty real.

