Regenerate Ring (Spell)

You invoke healing energy over a group of creatures, granting each the fast healing ability for the duration of the spell.

(Masters of the Wild: A Guidebook to Barbarians, Druids, and Rangers)
Originally posted on D&D tools

Conjuration (Healing)

Level: Druid 3,
Components: V, S,
Casting Time: 1 action
Range: 20 ft.
Target: One creature/two levels, no two of which can be more than 30 ft. apart
Duration: 10 rounds + 1 round/two levels
Saving Throw: Will negates (harmless)
Spell Resistance: Yes (harmless)

• This healing applies only to damage sustained during the spells duration, not to that from previous injuries.
• Each subject heals 1 hit point per round of such damage until the spell ends and is automatically stabilized if he or she begins dying from hit point loss during that time.
• Regenerate ring does not restore hit points lost from starvation, thirst, or suffocation, nor does it allow a creature to regrow or attach lost body parts.
• The effects of multiple regenerate spells do not stack; only the highest-level effect applies.
• Applying a second regenerate spell of equal level extends the first spell’s duration by the full duration of the second spell.