I have to say it's a nice idea although fact is that without (actually even with since they usually get destroyed or stolen) eternities you can die to aggro too fast and get rekt by control too easily. What I'd recommend is using even more card draw, maybe cutting some of those precognitions for hourglasses. I've tried it that way and it works a bit better. I've also dumped a scarab for another eternty, since it is crucial for board control.