One aspect that may need to be looked at is the fact that you actually pay three creatures' quantum cost for two creatures. Not a huge issue, though.
I'm sure this is powerful enough, OT... not only Scarabs, but Vampires, Chargers, Otyughs, Wardens in a Graboid deck, etc. etc. Part of the difficulty in playing PU is that the cost is so high, you have to prepare for crazy kinds of quantum production in Aether with any combo. This can be imported to nearly any deck. It allows you to play a Time mark and see any creature you've drawn twice, pre-empting CC.