The scariest card in the spellbook arsenal is spellbook of judgement. And let me tell you a thing you probalbly havent noticed. Its a quick play, so you can play it in you opponents turn. So, in a mirror match, you can make your opponent cry:
He activates spellbook of secrets, getting judgement. Then, at the moment he activates, you chain with your preety set card. Now, he has 2 choices:
1. Waste his spellbook of judgement, giving you a chance to recuperate
2. Give you a free +4
As you can see, it makes it all easier. And anyway, you get a spellbook because of the opponents spellbook of judgement, so even if he chooses the first, you still can recuperate by a +1.
I'll continue this later