Scale up camera mask on collision

Hi all. I am trying to make a somewhat foggy view for the player. For that i use a sprite mask as a c$$anonymous$$ld of the camera. As it is now, when player $$anonymous$$t a collider, the mask destroyes.

I want the mask sprite to scale up, so it looks like its slowly disappered and then i can destroy it. I can set a script on a emty game object with a trigger collider, but i cant figure out how to point the localscale to the sprite mask. So, i need help. Anybody have an idea Brian

public GameObject cammask;

     private void OnTriggerEnter2D(Collider2D collision)
     {
         if (collision.gameObject.CompareTag("Player"))
             {
             Destroy(cammask);
         }
         // i know t$$anonymous$$s is the form to use    
         //transform.localScale = transform.localScale + new Vector3(1 * Time.deltaTime, 0, 0);  
     }