I die as I lived: Being punned to death.
Not confirmed for release, etc.
ワープばあちゃん3姉妹 Warp Baachan San Shimai (The Three Warp(speed)-Granny Sisters)
Level 3 LIGHT Reptile Normal Monster
ATK 1300
DEF 300
Note: This card is likely a reference to the Turbo Granny (ターボばあちゃん), an urban legend/ghost story in Japan of a granny who races at 100 kilometers per hour.
三宮金GロボIII改 Sannomiyakin G Robo Three Kai (Sannomiya Golden G Robo MK-III)
Level 3 LIGHT Reptile Normal Monster
ATK 300
DEF 1500
Note: This card is a play on the name of Ninomiya Kinjirou, a prominent 19th-century Japanese agriculturalist, philosopher, moralist, and economist. It literally looks like him, and its name sounds like his name, except they changed “Ni” (two) to “San” (three). There are some stories in which it’s said his statues run around schools at night.
白色矮星人サンジェルマン Hakushokuwaiseijin San Germain (Alien Count of the White Dwarf, St. Germain)
Level 7 LIGHT Reptile Normal Monster
ATK 2500
DEF 1300
Note: This card is based on St. Germain, a famous adventurer in European high society, who is a man of many rumors, such as being a vampire, an immortal, an alchemist, many of which were spread by himself to make his past as obtuse and obscure as possible.
Hakushoku (White) sounds like Hakushaku (Count/Earl). Hakushokuwaisei is a White Dwarf. Seijin is Japanese for Alien. San is for Mitsuko’s recurring theme of “Three” in her cards, and it’s the French pronunciation for Saint.
エリアン33 Alien 33
Level 3 LIGHT Reptile Normal Monster
ATK 1100
DEF 1100
Note: I don’t think this is a specific reference other than maybe Alien 3?
300光年アカイマント 300 Kounen Akai Mant (300 Light-Year Red Cloak)
Normal Spell Card
[REQUIREMENT] If there are 3 face-up Reptile monsters on your field, you can activate this.
[EFFECT] All face-up Reptile monsters on your field gain 300 ATK until the end of the turn. If your opponent has 3000 or more LP than you, you can also choose 1 face-up Normal Monster on your opponent’s field and destroy it.
Note: This card is named after Aka Mant, a deadly Japanese ghost encountered in bathrooms, it’ll offer you colored toilet paper, and well, there’s a good chance one way or another, you’ll die.
ゲッコーの3不思議 Gekkou no San Fushigi (The Three Moonlit Mystery Geckos)
Normal Trap Card
[REQUIREMENT] If there is a face-up Level 3 or lower Reptile Normal Monster on your field, when your opponent’s monster declares an attack, you can activate this.
[EFFECT] Choose 1 face-up Reptile monster on your field, until the end of the turn, it gains 1000 ATK x [The number of face-up Reptile monsters on your field].
Note: Gekkou (Moonlight) sounds the same as Gecko. It’s vaguely referencing how schools will often have various wonders or mysteries in Japanese pop culture.