- NON-CANON CONTENT
This article covers non-canon creations that might not have been produced by the author of the light novel series.
Amalthea ｢鏡界之母, amaruteia, lit. "Mother of Mirror Realm"｣ is the Ultimate skill awakened by Izis after undergoing a Harvest Festival and evolving into a True demon lord.
Abilities[]
It allows the user total control over the Mirror World, with the Mirror World becoming the same size as the Central World. It also allows the user to freely alter any laws within the Mirror World. However it is less effective if the user is outside the Mirror World shown when Izis struggled against her creator Cliché because of it even with Veldora Against's Magicules.
It was also able for a user to use an ability similar to Beelzebuth shown when Izis used it to absorb Veldora Against's Magicules when Rimuru successfully attempted to separate him from Shinsha with Beelzebuth.