I think that the ability should be passive i.e. non-removable. My non-perfect definition of an active skill is one that is triggered by the owner or on an attack and passive is everything else. I know this doesn't work for everything but it does for most. So I think the skill should be passive.
Speaking of passives, does this affect only active abilities like a normal lobotomizer of does it also remove all passives, such as airborne, swarm, mutant, undead, poisonous, obsession etc. If its all then its quite a powerful effect (not to say its OP), if it is just active abilities then you should change the text somehow. Maybe "all creatures on the attacker's field are lobotomized."
As a side note, I don't like the name. I don't think that a creature should be called an abstract noun (an object that cannot be physically touched, such as sorrow). Of course, this is of little significance, you could easily call it something else sorrowful. Or not, that's just my opinion.
As another side note, "attacker" not "attarker". Typos strike again.
Now that I've done with that, I think this could be a viable card. There are few decks that rely solely on vanilla creatures so this could work quite well. Maybe it would work better against AI's than against human players but it could still work as a Mass CC repellant. There have been other variations on mass lobotmization but this is well worked.
