Labyrinth Wall Shadow

Monsters cannot attack the turn they are Summoned, except monsters whose original Level is 5 or higher. Once per turn, during your Main Phase: You can place 1 of your "Sanga of the Thunder", "Kazejin", or "Suijin" that is banished, or in your hand or Deck, face-up in your Spell & Trap Zone as a Continuous Spell. At the start of your opponent's Battle Phase: You can target 1 monster your opponent controls with less than 1600 ATK: destroy it.