Chamber Dragonmaid (BLMM-EN062) [Battles of Legend: Monster Mayhem]

If this card is Normal or Special Summoned: You can add 1 "Dragonmaid" Spell/Trap from your Deck to your hand. At the start of the Battle Phase: You can return this card to the hand, and if you do, Special Summon 1 Level 7 or higher "Dragonmaid" monster from your hand or GY. You can only use each effect of "Chamber Dragonmaid" once per turn.