Knightmare
Yu-Gi-Oh! archetype · 10 cards
Knightmare CerberusFLOD-EN045 · Flames of Destruction · +2 printings
Knightmare Corruptor IbleeFLOD-EN017 · Flames of Destruction · +2 printings
Knightmare GoblinFLOD-EN044 · Flames of Destruction
Knightmare GryphonFLOD-EN048 · Flames of Destruction · +2 printings
Knightmare Incarnation IdleeDANE-EN017 · Dark Neostorm · +1 printing
Knightmare MermaidFLOD-EN043 · Flames of Destruction · +1 printing
Knightmare PhoenixFLOD-EN046 · Flames of Destruction · +12 printings
Knightmare UnicornFLOD-EN047 · Flames of Destruction · +12 printings
Orcust KnightmareSAST-EN021 · Savage Strike · +3 printings
World Legacy's NightmareFLOD-EN059 · Flames of Destruction · +1 printing
Archetypes from YGOPRODeck and YAML Yugi (Yugipedia).