Darkstorm Dragon (SR02-EN012) [Structure Deck: Rise of the True Dragons]

This card is treated as a Normal Monster while face-up on the field or in the Graveyard. While this card is face-up on the field, you can Normal Summon it to have it become an Effect Monster with this effect.
<br><b>-</b> Once per turn: You can send 1 face-up Spell/Trap Card you control to the Graveyard; destroy all Spell and Trap Cards on the field.