Celtic Guardian + Dragon Statue → Sword Arm of Dragon

Celtic Guardian + Blue-eyed Silver Zombie → Armored Zombie

Celtic Guardian + Flame Manipulator → Flame Swordsman

Celtic Guardian + Temple of Skulls → Dark Elf

Celtic Guardian + The Shadow Who Controls the Dark → Dark Elf

Celtic Guardian + Lord of the Lamp → Dark Elf

Celtic Guardian + Dokuroizo the Grim Reaper → Armored Zombie

Celtic Guardian + Fire Reaper → Armored Zombie

Celtic Guardian + Firegrass → Flame Swordsman

Celtic Guardian + Lord of Zemia → Dark Elf

Celtic Guardian + The Judgement Hand → Judge Man

Celtic Guardian + Darkfire Dragon → Flame Swordsman