I believe you are missing the CoR... let me add it for you
Crystal of Readiness (cost) 15
Target creature's skill costs 0
If target creature is
, it may use it's skill 6 times this turn. (would be schmexy)
I know my failed sarcasm is failed, but imo it doesn't seem as if Forge Crystal would do that much, except for making shards a little more susceptible to PC such as Steal. Good idea imo, but I don't think it'd work too great :3
EDIT: Epic Fail, my maths + lack of sleep = Bad
Kay now that I reread that, it somewhat seems like a good idea, although it might be a bit OP, I suggest making the Crystal do as much as 4 of the shards instead of 5, which would still make it a worthwhile card