This can be use as a potent draw/play denial and allow you to overcome the rule of 6. Look at that:
- Copy your pillars, play them, copy your books, play them, n times, then play your dragons and copy them ... not talking about hourglasses.
- What about playing more than 6 dim shield?
- What if for 1
/turn your opponent can only draw pillars?
might need some tweaking