Ancient Warriors Saga - Defense of Changban — Ruling

Effetto 0

You can activate this face-down card at any time except during the Damage Step.
This card's effect that prevents your opponent from targeting your "Ancient Warriors" monsters for attacks starts a Chain. (It does not target. Sending this face-up card to the Graveyard is the cost to activate this effect.)
This card's effect that prevents your opponent from activating Spell/Trap Cards when a "Ancient Warriors" monster battles does not start a Chain.
This card's effect that Special Summons a "Ancient Warriors" monster from your Deck starts a Chain and activates in the Graveyard. (It does not target. Banishing this card from your Graveyard is the cost to activate this effect.)

This card's ① st effect is not an activated effect, which is applied in the Spell & Trap Zone.

This card's ③ rd effect is an activated effect, which can be activated in the Graveyard.