Number 23: Lancelot, Ghost Knight of the Underworld
Rank 8 DARK Zombie-Type Xyz Effect Monster
ATK 2000
DEF 1500
Xyz Materials: 2 Level 8 monsters
While this card has Xyz Material, this card can attack your opponent directly. When this card inflicts battle damage to your opponent: You can target 1 face-up monster your opponent controls; destroy it. Once per turn, during either player’s turn, when a Spell Card, Trap Card, or monster effect, except this card, is activated: Detach 1 Xyz Material from this card; negate the activation.

Release Date for the OCG is August 4th, 2014

Source