"Poly-Chemicritter Dioxogre" is the main beater, who is able to make the summons of Gemini monsters unnegatable while also sporting a removal effect, while the single copy of "Poly-Chemicritter Hydragon" is less powerful, but can have uses by boosting and protecting your monsters
Japanese SAR cards and English Special Illustration Rare (SIR) cards are mechanically equivalent different market prints of the same alt-art concept
The last one is Eleven, the Mage (and her in-Magic reprint
Tra is not as useless and self-harming as Dua, bit it still fails to provide any reason why I'd play it over something like Ghostrick Alucard, Constellar Hyades, Levaiar (gets back my banished Agents), Zenmaines or even 49: Fortune Tune
Hopefully this will help you with your blue enchantment removal woes and make your blue decks better prepared to handle enchantments
Unfinity marks a departure from the silver-bordered cards