If your Ancient Warriors monster battles, your opponent cannot activate any Spell Trap Cards until the end of the Damage Step. You can only use 1 of the following effects of Ancient Warriors Saga – Defense of Changban per turn, and only once that turn.
• At the start of your opponent s Battle Phase: You can send this face-up card from your Spell & Trap Zone to the GY; monsters your opponent controls cannot target Ancient Warriors monsters for attacks this turn.
• When an opponent s monster declares an attack: You can banish this card from your GY; Special Summon 1 Ancient Warriors monster from your Deck.