In Arcuz, crystals are combined with stones and equipment in composition in order to add beneficial effects, increasing their effectiveness. Crystals come in a variety of elements and sizes. The size of a crystal can be increased through composition.

There are a total of four elements:

  • Fire
  • Water
  • Earth
  • Wind

Crystals come in three sizes:

  • Small
  • Medium
  • Large

Crystals can be bought from Susan, the owner of the Potion Shop, although they don't stock very often. Prices will vary with size: small crystals cost 100 gold; medium crystals cost 300 gold; large crystals cost 800 gold.

In order for Susan to refresh/restock her inventory, the player must move out of the area (in this case, the Arcuz Village).