Essence Flux being downshifted is the first 1 mana blink in blue at common. There are only 5 spirits in the cube at the moment, but I hope my drafters won't get too distracted by that. I'm replacing Planar Incision because 1 mana vs 2 is a big deal.

The only other card from INR I was considering was Village Messenger but I like my current red 1 drops more.