The reason I argue for playing things like Library and KoTR is because, as nice as it would be to believe it does, zoo does not kill nearly as quickly as people want it to 99% of the time. You get interference from swords, force, daze, and so on. So you may goldfish on turn 4, but in real games you will not win until turns 6-7 often, and many times later. It is in those situations where you need to be able to produce larger threats to push through the last bits of damage, or more consistent threats. Library helps give you the card quality you need to end the game, and Knight gives you an excellent tool to push through their end game blockers with. I'm less enthusiastic about Thoctar since he quickly gets outclassed by opposing goyfs, but Knight is a great tool that allows you to win games simply by saying 'my guy is bigger than your team.'

