"Evigishki" (or just "Gishki" on certain cards), known as "Eviritua" (イビリチュア Ibirichua) in Japan, is a series mainly composed of WATER Ritual Monsters (and, more recently, Xyz Monsters too) that is part of the "Gishki" archetype. They are Ritual Summoned using one of the numerous "Gishki" Ritual Spell Cards, most prominently "Gishki Aquamirror". They receive implicit support from "Gishki" support cards, but have no true support cards of their own.