Feed The Beast Wiki
Pixie Jar

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A Pixie Jar is obtained by holding an Empty Jar and right-clicking on a Pixie.

Right-clicking while holding a Pixie Jar will release the Pixie. Pixies cannot be placed in the Nether, it will respond with "Pixies cannot survive in this environment!" Although Pixies can be spawned using spawn eggs (using creative) in the Nether and will not automatically die.