Rising of the Northern Lights

Enceladustellime is a portmanteau of Enceladus—the sixth-largest moon of Saturn, known for its icy surface and active geysers—and Interstellime.

Twi-Rider is a portmanteau of twilight and rider.

Vanishing Solithius is based on Sirius—the brightest star in the night sky, located in the southern constellation of Canis Major.

Solithius seems to be a twist on sol (Latin for "sun"), Sothis (thought to be the Ancient Greek name of the star Sirius), and Sirius.

During the early period of Egyptian civilization, the heliacal rising of Sirius preceded the usual annual flooding of the Nile.

Sopdet is the Ancient Egyptian name of the star Sirius and its personification as an Egyptian goddess.

Terecoroid is a portmanteau of tereko (the Japanese term for a tape recorder) and android.

Reporter Unit (Hōdōkijin) is a play on hōdōkisha (another Japanese term for "journalist" or "reporter") and kijin ("machine person").

Casterlin might be a play on newscaster and lilin—a term for night spirits in Jewish mythology.

Speed-Snapper Machine ENG is a reference to electronic news gathering (ENG)—the usage of electronic video and audio technologies by reporters to gather and present news instead of using film cameras. The term was coined during the rise of videotape technology in the 1970s.

Headhorn is a pun on headphone and horn—with phone and horn both being pronounced as hōn in Japanese.

Onslaught Machine (Totsugeki Mashin) is a play on totsugeki shuzai—the Japanese term for a surprise interview.

Toughroid Flash is a reference to a news flash.

Lates (Ratesu) is meant to be an anagram of Sutera ("Stella").

Flaygal is a twist on flame.

Greeray is a twist on green.

Emergent sounds similar to Rising HERO Argent.

Keelkappah is a reference to the kappa (a water-dwelling yokai, typically depicted as a humanoid with a turtle shell, scaly skin, and a water-filled dish on its head)—and to how the word is sometimes applied to water-related products including boats and marine equipment in Japan.

Rigallum is a twist on gallium—a soft, silvery-white metal and the chemical element of atomic number 31.

The R in Argent R could likely stand for rookie or revision/reborn.

Ajisai is the Japanese name of the bigleaf hydrangea (Hydrangea macrophylla).

Flowerfang Tea Whisker (Kagetate) comes from the Japanese phrase cha o tateru—to prepare matcha by whisking it with a tea whisk into hot water.

Death Guide (Desu Gaido) is a pun on bus guide (basu gaido in Japanese).

Departing from the Demon Realm, Bound for the Realm of the Living is phrased in the style of a train/bus departure announcement. Such phrasing is commonly used as part of PA system announcements at Japanese stations.

Devil's Mirage is a counterpart to the OCG's Mirage—a Normal Monster which was one of the necessary sacrifices for the Ritual Summon of Devil's Mirror in the early-era Yu-Gi-Oh! Duel Monsters video games.

Devil's Absoluter is a counterpart to the OCG's Absoluter—a Normal Monster which was one of the necessary sacrifices for the Ritual Summon of Devil's Mirror in the early-era Yu-Gi-Oh! Duel Monsters video games.

The Dullahan is a type of legendary creature in Irish folklore depicted as a headless rider on a black horse, or as a coachman, who carries his own head.

Soh-En is written with the kanji for "azure flame" in Japanese.

Masshig Nyangler (Masshigu Nyangurā) is a pun on the Japanese phrase neko masshigura (meaning "a cat's headlong dash")—which serves as an advertising slogan most famously associated with Ciao Churu, a popular Japanese cat treat made by Inaba Foods.

Nyangler is a portmanteau of nyan (Japanese for "meow") and angler (another word for a fisherman).

Interscrime is a portmanteau of Interstellime and scrum (a tightly packed and disorderly crowd of people).

Rising HERO Argent O is likely named after silver oxide—with argent being an archaic word for the metal silver ("Ag" in chemical notation) and O being the chemical symbol for oxygen.

Rising HERO Argent F is likely named after silver fluoride—with argent being an archaic word for the metal silver ("Ag" in chemical notation) and F being the chemical symbol for fluorine.

The Absorbing Devil's Mirror is a reference to the flavor text of the original Devil's Mirror in some of the early-era video games: "Anything reflected in this evil mirror will be drawn into the world inside the mirror."

Gogai-Burn is a pun on the Japanese term for a newspaper extra or extra edition (gōgai-ban)—a special issue of a newspaper published outside the regular schedule to report major or breaking news that arrived too late for the standard edition.

This card is a modern-day counterpart to Kawara-Burn—which features a similar pun in its name.

The Three Sages Embark on Their Journey is meant to tie in with the Magistus story arc of Yu-Gi-Oh! CARD GAME THE CHRONICLES—as it features the three main characters of the Magistus storyline: Aleister, Endymion, and Verre.

The term Sage is used in the kanji subnames of each of their Magistus counterparts.

We Have a Major Incident! is an upgraded remake of the original We Have an Incident!.

Hysteric Eyes is a reference to the OCG's Shadow of Seduction—which was used by Mai Kujaku in the Duel Monsters anime/manga.

Its effect of countering Ritual Monsters is a reference to how Mai Kujaku lost to Yugi Muto's Chaos Soldier (a Ritual Monster) during their Duel in the Duelist Kingdom semifinals.

Guidance of the Dark Devil-God is a reference to the OCG's Nightmare the Dark Devil-God—whose flavor text describes it as taking the lives of those sleeping.

Raffinato is Italian for "refined" or "elegant."

Lofty Vigil-Keeper God of the Sacred Hills is based on the nine-tailed fox from Chinese mythology—a mythical fox entity with nine tails first described in the ancient Chinese text Shanhaijing.

The Sacred Hills in its name is a reference to Qingqiu (Chinese for "Azure Hills")—a legendary place in Chinese mythology and literature said to house the nine-tailed fox.

Lofty Vigil-Keeper God (Gogyōshin) is a pun on the Gods of the Five Elements from Chinese mythology (also pronounced as gogyōshin in Japanese)—with the first two kanji instead being the ones meaning "protective" and "high"/"lofty" respectively.