Mammoth Graveyard + Wicked Dragon with the Ersatz Head → Koumori Dragon

Mammoth Graveyard + Yaranzo → Great Mammoth of Goldfine

Mammoth Graveyard + Megasonic Eye → Cyber Saurus

Mammoth Graveyard + Three-legged Zombies → Great Mammoth of Goldfine

Mammoth Graveyard + Shadow Ghoul → Great Mammoth of Goldfine

Mammoth Graveyard + Pendulum Machine → Cyber Saurus

Mammoth Graveyard + Steel Scorpion → Cyber Saurus

Mammoth Graveyard + Saber Slasher → Cyber Saurus

Mammoth Graveyard + Yaiba Robo → Cyber Saurus

Mammoth Graveyard + Giant Mech-soldier → Cyber Saurus

Mammoth Graveyard + Mechanical Spider → Cyber Saurus

Mammoth Graveyard + Bat → Cyber Saurus