I know. every time it went into ghost form as I said in the post it disappeared and went in the wall due to the tornadoes. It was unkillable when i went in operator to shoot it it was in a wall or invisible/unkillable and would immediately go back into he body due to being forced out of bounds. because it was out of bounds. It failed in the middle of the mission at 50ish of 150. i wish i could post the clip so it makes sense. Mission didn't fail because I didn't kill a thrax it failed cuz it bugged out of bounds.