Dreams of the Dead? That's nifty tech. My Aminatou does have an infinite loop, with Felidar Guardian + Oath of Teferi, I can infinitely flicker a permanent of mine to win. Current payloads are currently Kaya, Ghost Assassin's -1 to drain the table, Gray Merchant to do the same, Gonti to exile all libraries ...At least with Roon and Aminatou there's some inherent limits, and Aminatou has more than just blink as a viable build path. My Aminatou deck just uses the blinking for occasional value (i.e., pairing with Dreams of the Dead to get around the drawback of Dreams of the Dead) and focuses on library manipulation.
I also have Demonic Pact in the deck, and I have killed someone with it, and it was awesome.