Forgotten Underworld
- Cards
- 40
Collection
40 printings
- Chain Ignition
- Cross-Sheep
- Fusion Recovery
- High Rate Draw
- Magnum the Reliever
- Mementoal Tecuhtlica - Combined Creation
- Mementomictlan
- Mementomictlan Tecuhtlica - Creation King
- Mementotlan Akihiron
- Mementotlan Angwitch
- Mementotlan Bone Back
- Mementotlan Bone Party
- Mementotlan Cranium Burst
- Mementotlan Dark Blade
- Mementotlan Fracture Dance
- Mementotlan Fusion
- Mementotlan Ghattic
- Mementotlan Goblin
- Mementotlan Mace
- Mementotlan Shleepy
- Mementotlan Tatsunootoshigo
- Mementotlan Twin Dragon
- Mementotlan-Horned Dragon
- Paralyzing Mushroom
- Polymerization
- Supply Squad
- Thunder Dragon
- Thunder Dragon Colossus
- Thunder Dragon Discharge
- Thunder Dragon Fusion
- Thunder Dragon Thunderstormech
- Thunder Dragon Titan
- Thunder Dragondark
- Thunder Dragonduo
- Thunder Dragonhawk
- Thunder Dragonlord
- Thunder Dragonmatrix
- Thunder Dragonroar
- Thunder Dragons' Hundred Thunders
- Twin-Headed Thunder Dragon
