Card Rulings:Reptilianne Hydra

OCG Rulings

 * For the effect of ":", "destroy all face-up monsters your opponent controls with 0 ATK" and "draw a number of cards equal to the number of monsters destroyed" are considered to resolve simultaneously.
 * Example: If "Yubel" is destroyed by the effect of ":", then the effect of "Yubel" may be activated.