Dark Flame Knight is the exception even when it was released over two decades ago, it required another Flame Swordsman, a Fusion Monster in its own right, as a material
Mosswood Dreadknight will be a dreadful pain in the ass for your opponents, swinging for damage or providing an effective blocker, and then giving you card advantage again and again, until it gets exiled
Implement of Combustion If you want to unlock damage-based synergies like those required to turn on spectacle or bloodthirst, Implement of Combustion is playable
A lower price doesn't always mean a better deal for the buyer, especially if your card is in better condition or has better photos than the competition
C Common The Phantom Knights of Lost Vambrace X TRAP Target 1 face-up monster on the field
Then they'll also get a +1/+1 counter too right on them