Enhance Dragon (エンハンス·ドラゴン Enhansu Doragon) is an archetype of Dragon-Type monsters used by Yuki, and is one of multiple archetypes that derive from the Dragons of the Summoning Dimensions, consisting of Yuki's ace card, "Golden Armor Enhance Dragon", and other Enhance Monsters that are off-shoots of it.
This is an open archetype, and is not restricted to any one cardmaker.
Playing off of "Golden Armor", "Enhance Dragon" monsters involve spawning Tokens to empower your strategies, OR using different counters on either this card to increase its power or to other monsters to weaken. As with their "Enhance Effect", they have various effects that work independently to their Token or counter-spawning "Normal Effects", which involve Aggro effects and, sometimes, anti-Level 5 or higher strategies.
As they are all Enhance Monsters, they use a specific Equip Spell Card that is common to all members of the archetype and links to all Dragon-Type monsters with 2500 ATK and 2000 DEF; its name is "Dimension Armor".