Vanguard of the Dragon (SGX3-ENB11) - Speed Duel GX: Duelists of Shadows 1st Edition

You can send 1 Dragon-Type monster from your hand to the Graveyard to have this card gain 300 ATK. When this card you control is sent to the Graveyard by your opponent's card effect, you can Special Summon 1 Dragon-Type Normal Monster from either player's Graveyard.