Adamantoise can be easily defeated by using Level 5 Death, which can be obtained in the Library of the Ancients. Should the player fight it normally, it is wise to bring along a dedicated healer and two characters capable of hammering it with Ice spells and abilities. Both Blizzara and the accompanying Spellblade work well. Without these skills, one may break Ice Rods to deal major damage.
Adamantoise is a portmanteau of "adamantite" and "tortoise".
[view·edit·purge]Adamantite and similar words including Adamant and Adamantine are used to refer to any especially hard substance, whether composed of diamond, some other gemstone, or some type of metal.