I can't seem to find the rules section so I know this will be moved.
My question is if you cast a spell for it's mirical cost on your upkeep can it be canceled?
Canceled=countered?
*Miracle.
You are still casting the spell, like normal, just a lower cost. It should be countered the same as a normal spell.
As long as your opponent has the mana open and a counter spell in hand, miracle cards can be countered. If they weren't able to be countered... Well, we'd have a serious problem