Inferno of the Ashened Common

When this card is activated: You can place 1 "Obsidim, the Ashened City" from your Deck, face-up in either Field Zone. You can target 1 face-up card your opponent controls and 1 Level 8 or higher DARK Pyro monster in your GY; send that card on the field to the GY, and if you do, Special Summon that other monster from your GY to your opponent's field in Defense Position. You can only use this effect of "Inferno of the Ashened" once per turn. You can only activate 1 "Inferno of the Ashened" per turn.