[2K3] A POSSIBLE COUNTER ABILITY?

So I've been thinking of having a Counter ability in the game, and been thinking if this is possible to do at all. I know one of the ways to check to see if HP is decreased by the enemy and not something like an ability or some such is just to have conditional branches (which I can probably run in a common event and call in a Turns Elapsed x1 event) checking if the user has a status. The problem though is having the user counter after taking damage from the enemy.

Would this be possible to do at all? I know it's next to impossible to have it determine if the attack is physical or magical in nature, so I'm just going to aim for any type of damage, and I'm even thinking of having a skill that provides a status that makes it so until the character's next turn or X turns, that character will counter any damage they take.

So it would require C++ coding to do huh? Arrrrgh stuff I don't know how to deal with! Unless someone already figured out how to do so?

EDIT - By that logic then, a Cover command could also be done, no?