You can draw 40 cards, stop, and then use your hand full of counterspells to protect your win
Zvi Mowshowitz built a combo deck around it that so dominated both that it needed to be banned almost immediately after the inception of his deck
What are the cards players covet the most from Magic 's new, fast-paced set
Honestly, I dont have a lot of faith in those strategies because theyre vulnerable to graveyard hate and creature removal, but its worth noting that this is very easy to combo with, especially if youre looking to use Emry in Commander, where it should be patently absurd, given that it will basically always cost U even after its been killed several times, and is very easy to combo with, which is the cleanest way to win a game of Commander
I hope these don't break Standard or confuse players too much, so that we can continue to see such mechanics on the occasional, new card