Power Ring
From Multiversal Omnipedia
- For other uses of this name, see Power Ring (disambiguation).
The power ring is the primary weapon of the various Green Lanterns. The power ring, which is recharged via a Power Battery, can shape emerald energy into any shape or device or effect desired by the user. It can create complex machines or big fists, suits of armor or anvils. The energy can also be focused as a blast, used as a universal translator, or even maintain the ebbing life energies of the dead, among many other effects. It is limited only by the user's willpower and imagination. The power rings are widely considered the most powerful weapons in the universe.
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Green Lantern (Alan Scott)
The original Green Lantern, Alan Scott, had a magical Power Ring which was vulnerable to wood and had to be recharged every 24 hours. (This wood vulnerability was derived from this power ring's original source, the Starheart, which had merged with rogue Green Lantern Yalan Gur, whose ring was specially vulnerable to wood.) Long-term use of the ring apparently affected Alan's body, first by giving his offspring powers, and later by turning him into a being of living green flame. This ring was destroyed by Parallax but later recreated.
Green Lantern Corps
The Green Lantern Corps' power rings were ineffective against anything yellow, but also had to be recharged every 24 hours. The yellow vulnerability derived from the fear-entity Parallax, which was imprisoned within the Central Power Battery on Oa.
The power ring constantly protected their wielder from harm, could not be removed from their owner's possession unwillingly, and could be used as an information resource, since they had limited intelligence. The rings could also duplicate themselves, so that a Green Lantern could pass a ring on to someone worthy. The rings were not permitted to directly kill a person, but (unfortunately) a creative wielder could find ways around that.
Green Lantern (Kyle Rayner)
The power ring held by Kyle Rayner is similar, but has several differences from the "classic" rings. It is not vulnerable to yellow, nor does it need to be recharged every 24 hours- instead, it only needs to be recharged when it has used all of its energy (which varies depending on usage). However, its protective abilities are only running when specifically activated, and it lacks its own intelligence. During his stint as Ion, Kyle added an emergency reserve of power to the ring that would activate in crisis situations.
Alternate Futures
In Justice Legion A's timeline, Kyle's ring would eventually be buried as the "Knight Fragment" on Mars, and would eventually fall into the possession of the Prime Superman.

