Forum:About Red-Eyes Zombie Dragon

If Zombie World is face-up on the field then my Red-Eyes Zombie Dragon destroy Machiners Fortress,whose effect activate first?If Red-Eyes Zombie Dragon's effect activate first then I special summon Machiners Fortress in my field so do Machiners Fortress effect still activate since it has already face-up on my field?Thanks.Nightangle (talk • contribs) 14:15, March 17, 2011 (UTC)