The Moon Crystals are concentrated Moon Stones with enough power to control the Gigas, and with enough combined power to break the seal holding Zelos. There is a different colored Moon Crystal for each Moon.
Red Moon Crystal EditThe Red Moon Crystal is found in the Temple of Pyrynn under the Red Moon. Whoever holds the Red Moon Crystal can control Recumen, the Red Gigas.
Green Moon Crystal EditThe Green Moon Crystal is found in the temple at the top of Rixis under the Green Moon. Whoever holds the Green Moon Crystal can control Grendel, the Green Gigas.
Blue Moon Crystal EditThe Blue Moon Crystal is found deep in Mount Kazai under the Blue Moon. Whoever holds the Blue Moon Crystal can control Bluheim, the Blue Gigas.
Purple Moon Crystal Edit
Yellow Moon Crystal Edit
Silver Moon Crystal Edit
A piece of the Silver Moon Crystal lies in every Silvite. Whoever holds the Silver Moon Crystal can control Zelos, the Silver Gigas, although all the Moon Crystals are required to break the seal on Zelos.