The comparison to FOW is that you pitch a blue card but you don’t lose a life which is very relevant. You can only pitch when it’s not your turn and it can’t hit creatures. So, it’s good in blue mirrors and against certain combo decks.
This card is for sure playable and will see play especially since we have the insane planeswalkers running around that are only starting to change the meta. Even against shops you can stop Trinisphere and Sphere of Resistance on their turn one. I would say 2 of main maybe over Flusterstorm.