One of the more useful NetHack rings. Wearing it confers basic immunity to most paralysis effects. Specfically, you will be protected against effects from the following:

• Floating Eyes
• Gelatinous cubes
• Ghouls
• certain traps
• potions of paralysis
• potions of sleep
• Your own reflection if you are polymorphed into any of the above monsters
• The demon Yeenoghu

The above list is not exclusive, but you get the basic idea. A ring of free action is useful to have on when turning corners and running into a floating eye, or when being attacked by Yeenoghu under any cirumstances.