Forum:Mystic Swordsman's effect against CB

Small question: If I successfully attack my opponent's face down or up Crystal Beast monster (say Ruby Carbuncle), will he/she be able to activate the Crystal Beast's effect of setting it in the back row (spell/trap zones) instead of sending it to the graveyard? Or simply; will I be able to use Mystic Swordsman's effect (battling of course) to return my opponent's Crystal Beast to the top of his/her deck?

Mystic Swordsman lv6's card text: "If this card attacks a face-down Defense Position Monster, destroy the monster immediately with this card's effect without flipping it face-up or applying damage calculation. You can return the monster destroyed with this card's effect to the top of its owner's Deck, instead of sending it to the Graveyard."

Mystic Swordsman lv6's ruling states:
 * If "Mystic Swordsman LV6" attacks a face-down monster, its effect activates at the beginning of the Damage Step, before the monster is flipped face-up.


 * A monster destroyed by the effect of "Mystic Swordsman LV6" is not destroyed as a result of battle. There is no Damage Calculation. It is not flipped face-up. Any Flip Effects it has are not activated.

Crystal Beast in general (card text):
 * If this card is destroyed while it is in a Monster Card Zone, you can place it face-up in your Spell & Trap Card Zone as a Continuous Spell Card, instead of sending it to the Graveyard.