Thoughts: Completely bulk rare for tournament play—it just costs too much for the effect. For casual play, this reminds me of Blatant Thievery. At seven mana, one (permanent) Confiscate isn't a great deal. 4+ Confiscates is a steal. The ability to cast 4+ instants or sorceries for free seems great for Commander, and I expect Diluvian Primordial to become a staple for blue Commander decks, upon release.

Thoughts: When you're playing with a creature designed to mana accelerate, you want to make sure that the creature will reliably mana accelerate your board position. Gyre Sage is not reliable in this regard—the turn after you play him, you generally have to follow up with another creature (tapping out) or you get no effect out of Gyre Sage. I'd keep an eye on Gyre Sage for a possibility in Elf combo decks in Modern/Legacy, but my thoughts are that it is too slow for those formats. Should end up in the $1 range, for casual play.

Thoughts: Extremely popular thus far and might have the legs to hit the $8-$10 range before the set releases. Should go back down to the $4-$5 range 2-3 weeks after release but will be in demand due to short supply until the second or third wave of product hits.