[BOSH]Dinoster P Powerful Dracoslayer

1 "Dracoslayer" Pendulum Monster + 1 Pendulum Monster
Must first be Special Summoned (from your Extra Deck) by Tributing the above cards you control. (You do not use "Polymerization".) Pendulum Monsters in your Monster Zone and Pendulum Zones cannot be destroyed by battle or your opponent's card effects. Once per turn: You can Special Summon 1 "Dracoslayer" Pendulum Monster from your hand or Graveyard, but it cannot be used as a Fusion Material for a Summon.