- Man-Eating Plant
- Manju of the Ten Thousand Hands
- Marauding Captain
- Marie the Fallen One
- Marionette Burial
- Mark of the Rose
- Marshmallon
- Marshmallon Glasses
- Martyr Curse
- Masaki the Legendary Swordsman
- Mask of Dispel
- Mask of Perplexity
- Mask of Restrict
- Mask of the Accursed
- Masked Beast Des Gardius
- Masked Dragon
- Masked Knight LV3
- Masked Knight LV5
- Masked Knight LV7
- Master and Servant's Resolve
- Master Kyonshee
- Master of Oz
- Master of the Flaming Dragonswords
- Maternal Junk