Painful Evolution

When you control either 'Yubel' or 'Yubel - Terror Incarnate', you can choose 1 of the following: ● Send 1 'Yubel' you control to the Graveyard to play 'Yubel - Terror Incarnate' from your hand. ● Send 1 'Yubel - Terror Incarnate' you control to the Graveyard to play 'Yubel - The Ultimate Nightmare' from your hand. This Skill can only be used once per Duel.