how about
This card now seems broken when combined with Shard of Readiness and used on a time creature (especially one like Ghost of the Past or Silurian Dragon).
i will not say broken since we already have instosis. isint that broken too then?the effects are nearly the same,in fact,this will cause lesser damage,since there is no chance of using SoR on it again(will need another dragon).
instead,if you still think it is broken,then how about making this card a permanent that has a active ability to make all of your cratures airborne(to situationally bypass wings,but instead to benefit from sky blitz).thats because,once wings in activated and you have no airborne creatures,only PC can help you then.hence, making a card that atleast grants the airborne passive is absolutely needed