Most powerful Crystals?

[Wolf Kanno]

Which FF title did you feel had the most omnipotent Crystals?

[Galuf]

sadly these ones: http://home.eyesonff.com/attachment.php?attachmentid=64949&stc=1

anything that can kill the best FF character in history, then it must be powerful.

i dont know how to spoiler tag the images

[Sephiroth]

Final Fantasy IX and XIII's Existence Crystal.

[Mr. Carnelian]

Is the Existence Crystal that crystal you see in the closing cinematic of Lightning Returns, which contains an entire universe?

That's the most omnipotent crystal, I think.

[Sephiroth]

Yes. Just as the one behind Kuja is the one that stands for all existence.

[Psychotic]

Type-0, although FFIII main series. They're sentient.