Dream Eater from Guilds of Ravnica…
I kinda like the card. I can see it fitting into my Muldrotha Commander deck. That deck wants cards in the graveyard, and surveil was built for that deck. So being able to look at 4 cards, arrange them in any order and put back on top of the library, or put them into the graveyard is huge.

For 6 CMC there seems to be a lot of value when casting it. Firstly it has Flash, so you get to play it like an instant.

It’s a flying 4/3, which isn’t too shabby. But the card can be taken out by single hit removal like a lightning bolt. Which kinda is a negative.

Finally there is the surveil 4 that I’ve already talked about. Which to me is it’s big advantage. Flash out on the end step before your turn, allows you to make sure you are hopefully drawing the right card for the turn and putting useful stuff in the graveyard.

Not sure yet which card will get replaced by Dream Eater in the Muldrotha deck. But I do have a couple of “upgrades” I’m thinking about adding to the deck. So I can look at them at the same time I’m evaluating cards against Dream Eater. A deck is never finished…