Ruling EX  vs Tools!! Who Wins??

DS?//MEtaL FreAK

DS Metal Freak one of F.O.E.
If Altaria ex were to Dragon Mist attack on a defending pokemon that has mysterious shard attached to it, does the attack damages that pokemon?
For those of you who don't know,
the effect of Dragon Mist attack is: This attack isn't affected by Resistance, Poke-Powers, Poke-Bodies, or any other effect on the Defending Pokemon
effect of Mysterious Shard: Prevent all effect of attacks, including damage, done to the Pokemon that Mysterious Shard is attached to by your opponent's Pokemon-ex. Discard this card at the end of your opponent's next turn.