Revision 1

A Crystone is an item shown in the reveal of Xenoblade Genesis. According to that early material, it amplifies a Vesselai's power over Anima. The details here come from a single early source, the reveal trailer and its coverage, rather than Nintendo's official page, so they should be read as preliminary. The spelling and capitalization vary across coverage.

Function

The reveal describes a crystone as amplifying its bearer's power over Anima. Beyond boosting that power, early material indicates a crystone also records its bearer's thoughts, actions, and life, giving it a role that is both practical and personal.

Use in Weapons

According to the reveal, crystones are placed in weapons such as swords. Since the warriors who wield Anima fight with such weapons, the crystone appears tied closely to how a Vesselai fights. Crystones are also described as being used throughout life in the setting of the academy Leukos, in both academic and everyday contexts.

What Is Not Yet Known

Whether the crystone functions as a gameplay or upgrade system, and how crystones are obtained, has not been detailed. The reveal shows them only in the context of the world's lore, not as an explained mechanic. These details are deferred until Nintendo shares more.