Harpie Channeler [RA04-EN207] Platinum Secret Rare

You can discard 1 "Harpie" card; Special Summon 1 "Harpie" monster from your Deck in Defense Position, except "Harpie Channeler". You can only use this effect of "Harpie Channeler" once per turn. While you control a Dragon monster, this card's Level becomes 7. This card's name becomes "Harpie Lady" while on the field or in the GY.