I'm working on a yubel deck and I was just testing it, I ran into the opportunity to get two Terror Incarnates (Stage two of Yubel) on the field and was wondering, IF there were two Yubel, Terror incarnate on the field would they destroy each other during the end phase?
If indeed they do destroy one another then the controller would then be able to hit the field with two Yubel, The Ultimate Nightmare. allowing, hopefully, for some serious damage.
During your End Phase, destroy all other monsters on the field. If this card is removed from the field, you can Special Summon 1 "Yubel - The Ultimate Nightmare" from your hand, Deck or Graveyard.
If indeed they do destroy one another then the controller would then be able to hit the field with two Yubel, The Ultimate Nightmare. allowing, hopefully, for some serious damage.