Artifact Durendal

This is a Quick Effect that can be activated while this card is in the Monster Zone.

When activating this effect, choose which of the ● effects to activate.

This effect cannot be activated during the Damage Step.

Regarding the effect: "When a monster effect on the field is activated, or when a Normal Spell/Trap Card is activated: You can detach 1 Xyz Material from this card; that effect becomes 'Destroy 1 Spell/Trap Card your opponent controls'."

You can activate this effect while there is at least 1 Spell/Trap Card on your field.

This effect can be activated by chaining directly to the activation of a monster effect on the field, or the activation of an opponent's Normal Spell/Trap Card. (It cannot be activated by chaining to the activation of a Normal Spell/Trap Card's effect that does not involve the activation of the card itself.)

This is not an effect applied to a card. (The effect of a card that is unaffected by monster effects will also be changed to "Destroy 1 Spell/Trap Card your opponent controls".)

Regarding the effect "● You can detach 1 Xyz Material from this card; both players shuffle their entire hands into the Deck, then each player draws the same number of cards they shuffled into the Deck": - You can activate this effect even if either you or your opponent has 0 cards in their hand. (In that case, the player who has cards in their hand performs the resolution.) - You cannot activate this effect if both players have 0 cards in their hands. - The process of "both players shuffle their entire hands into the Deck" and the process of "then each player draws the same number of cards they shuffled into the Deck" are not treated as occurring simultaneously.