Horn Imp + Yamatano Dragon Scroll → Koumori Dragon

Horn Imp + Dragon Statue → Koumori Dragon

Horn Imp + Arlownay → Rose Spectre of Dunn

Horn Imp + Petit Dragon → Koumori Dragon

Horn Imp + Protector of the Throne → Invader of the Throne

Horn Imp + One-eyed Shield Dragon → Koumori Dragon

Horn Imp + Wicked Dragon with the Ersatz Head → Koumori Dragon

Horn Imp + Lesser Dragon → Koumori Dragon

Horn Imp + Fairy Dragon → Koumori Dragon

Battle Ox + Mystic Horseman → Rabid Horseman

Battle Ox + Dragon Statue → Baby Dragon

Rock Ogre Grotto #1 + Koumori Dragon → Stone D.