Castle of Dragon Souls (DPRP-EN031) - Duelist Pack: Rivals of the Pharaoh 1st Edition

Once per turn: You can banish 1 Dragon-Type monster from your Graveyard, then target 1 monster you control; it gains 700 ATK, until the End Phase (even after this card leaves the field or the monster becomes unaffected by card effects). When this face-up card on the field is sent to the Graveyard: You can target 1 of your banished Dragon-Type monsters; Special Summon that target. You can only control 1 "Castle of Dragon Souls".