Fire Force
So according to the New Ruling after Ring of Destruction if the opp reaches 0 you win without damage. Goodbye Original Mirror Force
When your opponent’s monster declares an attack: Destroy face-up Attack Position monsters your opponent controls, and if you do, inflict damage to your opponent equal to half the total ATK of all monsters destroyed by this effect, then, you take damage equal to the damage your opponent recieved.
So according to the New Ruling after Ring of Destruction if the opp reaches 0 you win without damage. Goodbye Original Mirror Force