Actually, you don't need Atogatog, or anything besides Barren Glory, Phantatog, and Enchanted Evening on the field, and a removal card in your hand. Tap out. Sac everything except Phantatog and Barren Glory, use floating mana to kill Phantatog. Can be done at instand speed too, though really if you have Barren Glory out that'll be their first target, or this guy, though that really wouldn't be effective.