"Chemicritter" (化（か）合（ごう）獣（じゅう） Kagōjū, "Chemical Beast") is an archetype of Level 2 and 8 Gemini monsters with multiple Attributes and Types that first appeared in Invasion: Vengeance. So far, all Level 2 "Chemicritter" monsters' combined ATK and DEF equal 2100 while the "Poly-" ones (Level 8) equal 3000. One oddity is that along with multiple Attributes and Types, each has a combination that is rare in the game, such as Aqua combined with FIRE and Beast combined with WIND.