The First Doctor The folks at EDHREC have The First Doctor way down at #14, but one thing makes it #1 in my book it searches up your TARDIS when it enters the battlefield and can even rescue it from the graveyard if it has been destroyed
Premium lenticular oversized card
This does not apply to the first turn of the first player, who does not draw, which slightly compensates for the first-player advantage
Dungeon Lost Mine of Phandelver Cave Entrance Scry 1
Oh, and single-handedly disallowing players from playing one-toughness creatures in the format during its reign ( we can't just go about forgetting that part
I imagine something like Entomb to tutor up a Bolas's Citadel, then casting Mox Amber to reanimate the Citadel and popping off from there could be a good start at what Moira can do, but I'm sure people can come up with far scarier lines than my quick example