For playing Final Fantasy XIII, I received a Key Item called "Eternal Crystal". Most Key Items don't really do anything outside of reminding you what you have for purposes of the plot. Does this one do anything special sometime though since it's optional?

  • I have noticed that playing 13 also got me the Lightning Mask. Commented Feb 14, 2012 at 3:20

3 Answers 3


The Eternal Crystal doesn't do anything: it's just there for bragging rights. If you play on the PS3, you also got an extra theme for playing Final Fantasy XIII.

Most key items do have a purpose, though:


The Eternal Crystal actually increases your luck at Serendipity's slot machines.

Here's the link to IGN (I believe). It clearly states that the Eternal Crystal adds luck to the Serendipity Slot Machines http://www.ign.com/wikis/final-fantasy-xiii-2/Special_Unlocks

  • 2
    Do you have a source for this? Commented Feb 14, 2012 at 3:20
  • 1
    Wikis are not reliable sources because anyone can edit them.
    – Frank
    Commented Mar 24, 2012 at 19:25

Having played the game myself, The crystal apparently increases your chances that the Slots will be in your favor, but I have yet to see a major change. Perhaps you should look around more. I DO know however, that having a FFXIII file unlocks 2 unique masks for your monsters.

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