There's been a lot of speculation regarding the viability of Sphinx of Foresight in Modern.
It looks like the card has some real power in Control decks, which would greatly appreciate the ability to scry three times at the start of the game as well as once every turn. However, that is not all.
Sphinx of Foresight could be used in combo decks that are specifically looking for certain cards also, where the free scry ability comes in very handy. Additionally, the 4/4 flying body is great for attacking and blocking.
It's a simple yet effective card that will surely find its place in the format, so keep your eyes peeled for it in the near future.