Once just a fancy insert, Topps Strata has gone legit. It is now its very own standalone Baseball card brand. As you know, these are acetate cards that promises two hits per box. BTW, boxes will cost you about $75 to $90 a piece for two cards. Go here for a complete checklist.
As you can see, there is no base set. Instead, every card either has an autograph, relic or both. One of the Kershaw cards comes with a redemption. There are a couple of cards I have yet to see, so I'll update this post once they come to light.