It took Krimeah a little more than a year to fashion a collar of chain mail imbued with a special polymorph self ability. The collar permits Jakar to change into any animal or human form up to 24 times a day, fully assuming all the physical abilities of the shape selected. Jakar cannot assume the form of an unnatural creature, such as an owlbear; the form must be of a natural animal. It is believed Kriineah made more than one of these collars, and some suspect that he gave them to others to create more jakar.
The druid was pleased with Krimeah's "gift;' and promptly pledged his life in defense of the vale and the mage. The druid donned the collar nearly three decades ago and has not seemed to have aged since. Jakar is at peace, moving more freely in the animal kingdom than he ever believed possible, and rarely selecting a human shape because he thinks of himself as an animal. He did not mind the side effects of the potent magical item; the druid cannot remove the collar and cannot cast druidical spells while wearing it. However, he has retained the following druidical abilities, which he can use in any form: identify plants, animals, and pure water; pass through undergrowth without leaving a trail; immune to charm spells cast by woodland creatures; +2 bonus to saving throws vs. all electrical and fire attacks.
The jakar speaks the language of the animal form it has assumed; in human form it speaks any languages it knew at the time the collar was placed on it.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.