An even bigger Songbird Serenade. Her card's info says: BUBN-EN009: XL Sia LIGHT | XL | Level 8 | ATK 0 | DEF 2800 Cannot be Normal Summoned/Set, except by Tributing 1 "OBs Sia". Cannot be destroyed by battle. Once per turn, when a OBs or XL monster(s) is Summoned, you can change that monster(s) to Defense Position. (Common)
