The “Blades” of each shard are in Alara Reborn. As you know, Alara Reborn took multicolor to Xtreme! levels. Here we have some of the hybrid plus regular mana cards. I doubt we will see this kind of cost any time soon, and I would guess never at common again.
The blades themselves are pretty cool, all 2/1 and get +1/+1 and an ability if you control another multicolored permanent.