Card Rulings talk:Fossil Dyna Pachycephalo

Overoncloud9 23:34, March 15, 2010 (UTC)if my face-down Fossil Dyna Pachycephalo is attacked by my opponent's monster, it gets flipped face-up during damage calculation, which fulfills the conditions of its Trigger effect. But does it have to be face-up on the field when it resolves in order for the effect to apply ('Destroy all Special Summoned monsters')?