Swamp
Yu-Gi-Oh! archetype · 5 cards
Beastking of the SwampsTP1-014 · Tournament Pack: 1st Season · +3 printings
King of the SwampAST-082 · Ancient Sanctuary · +9 printings
Muddy MudragonDANE-EN081 · Dark Neostorm · +2 printings
Mudragon of the SwampCT15-EN005 · 2018 Mega-Tins · +9 printings
Sorcerer of the SwampCORI-EN024 · Chaos Origins
Archetypes from YGOPRODeck and YAML Yugi (Yugipedia).