You can Ritual Summon this card with "Meteonis Drytron". Other "Drytron" monsters you control cannot be destroyed by your opponent's card effects. Twice per turn, when your opponent activates a monster effect (Quick Effect): You can banish "Drytron" monsters (min. 1) from your GY whose total ATK equal or exceed the original ATK of that monster; negate the activation, and if you do, destroy it. If this Ritual Summoned card in its owner's control is destroyed by an opponent's card: You can Special Summon 1 Ritual Monster with 4000 ATK from your hand or Deck. (This is treated as a Ritual Summon.)