The 13th Grave + Millennium Shield → Armored Zombie

The 13th Grave + Mystic Lamp → Magical Ghost

The 13th Grave + Swordsman from a Foreign Land → Armored Zombie

The 13th Grave + Metal Dragon → Curse of Dragon

The 13th Grave + Sky Dragon → Curse of Dragon

The 13th Grave + Thunder Dragon → Skelgon

The 13th Grave + Magician of Faith → Magical Ghost

The 13th Grave + Spike Seadra → Skelgon

The 13th Grave + Armed Ninja → Armored Zombie

The 13th Grave + Boo Koo → Magical Ghost

The 13th Grave + Rainbow Flower → Pumpking the King of Ghosts

The 13th Grave + Barrel Lily → Pumpking the King of Ghosts