Volcanic Doomfire [SGX1-ENH01] Secret Rare

Cannot Be Normal Summoned/Set. MUST FIRST BE Special Summoned (From Your Hand) by Sending 1 "Tri-Blaze Accelerator" You Control to the Gy. Duration your Opponent's Battle Phase, Attack Position Monsters Your Opponent Controls Must Attack This Card, If Able. When this card destroys a monster by battle and sends it to the gy: destroy as many monsters your opponent controls as possible, and if you do, inflict 500 damage to your opponent for each monster destroyed by this effect.