When you unlock this door, return up to one target creature to its owner's hand. (You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

Whenever one or more creatures you control deal combat damage to a player, draw a card. (You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)