Frost Blades of Boomerang

As an avid FB gamer I was kinda disappointed by the lack of a transfigured version that might appeal to the core style of FB gaming. FB of Katabasis is hardly having anything with Frost Blades.

Another hit on FB builds variety came from removing projectiles speed enchantment and changing gem quality, thus moving any return projectiles variations into "I do it not because it's good, but because I like it" zone.

So, here's my suggestion: 2nd transformed gem for Frost Blades that comes with built-in returning projectiles with a trade-off of having less projectiles. Which makes it arguably better for single target, and worse for clearing, but gives another way of scaling by getting additional projectiles (oh no, another build that benefits from add proj, I know).