Invasion: Vengeance provides more support for this archetype's Fusion and Gemini Summoning strategies.
As only one of its effects can be used per turn, "The Black Stone of Legend" can alternate each turn between Special Summoning a "Red-Eyes" monster from the Main Deck, and returning itself to the hand and a "Red-Eyes" monster from the Graveyard to the Deck.
"Black Metal Dragon" can equip itself to a "Red-Eyes" monster for an ATK boost and can search for a "Red-Eyes" card when sent to the Graveyard. "The Black Stone of Legend" and "Black Metal Dragon" can be revived by the effect of "Kinka-byo" or "Junk Synchron" to reuse their effects.
"Return of the Red-Eyes" is a powerful support card that can Special Summon a Normal Monster from the Graveyard while the player controls a "Red-Eyes" monster. It can be searched by "Black Metal Dragon" or "Dark Dragon Ritual".
"Red-Eyes Fusion" is capable of Fusion Summoning a "Red-Eyes" Fusion Monster by fusing from the hand, Deck, or field, but it cannot utilize the archetype's Gemini monsters, "Red-Eyes Black Flare Dragon" and "Red-Eyes Archfiend of Lightning", from the Deck to Summon "Archfiend Black Skull Dragon", as they are not treated as Normal Monsters there. "Polymerization" or "Dragon's Mirror" are viable substitutes to Fusion Summon "Archfiend Black Skull Dragon" while the aforementioned monsters are treated as Normal Monsters on the field and in the Graveyard. "Blazing Meteor Black Dragon" is a more flexible alternative that can be Summoned with "Red-Eyes Fusion", as it requires any Level 6 Dragon-Type monster in addition to a Level 7 "Red-Eyes" monster; its effect in tandem with "Red-Eyes Fusion" also useful for loading the Graveyard with revival targets.
The "Hieratic" archetype has support for Dragon-type Normal Monsters, which can be used in combination with "Return of the Red-Eyes" and "Blazing Meteor Black Dragon".
"Spark Field" can support the archetype's Gemini monsters as it allows them to be Normal Summoned without Tributing, then Normal Summoned again in the same turn to unlock their effects.