Forum:Worm Millidith

Here is the scenerio, there is a face down Worm Millidith face down on the field (400 atk/ 1600 def). A Monster with 1700 atk or more attacks it. Does Worm Millidith effect take place? (FLIP: You can equip this card to a monster your opponent controls as an Equip Card. Inflict 400 damage to the controller of the equipped monster during each Standby Phase.) or is it destroyed?