"Phantasm Spiral Dragon"
The kingpin of the archetype, "Phantasm Spiral Dragon", is a retrained version of "Spiral Serpent". The flavor text of the former explains that the monster has survived through countless battles, which are shown in the artworks of the archetype's Spell/Trap Cards, displaying several instances of "Spiral" fighting the "Atlantean" and "Fire King" monsters. The names of the Trap Cards, all containing "whirlpool", reflect the attack of "Sea Serpent" described in its flavor text.
The archetype is heavily spearheaded by "Phantasm Spiral Dragon". Its support cards revolve around quickly Special Summoning that monster and supporting Normal Monsters, ultimately trying to achieve a victory condition with "Phantasm Spiral Assault".
A basic build of the Deck would include several Normal Monsters and support for them, as well as anti-Effect Monster cards, such as "Heat Wave" and "Skill Drain". The archetype also includes Equip Spell Cards which are key cards to the Deck, so cards such as "Hidden Armory" can help boost the Deck's speed. The Trap Cards of this archetype can be activated from the hand while "Umi" is face-up on the field, so using these cards as lynchpins in a Umi Deck is very effective (even though "Spiral" itself does not get the ATK boost).