As an action, you can change your appearance and your voice. You determine the specifics of the changes, including your coloration, hair length, and sex - but your gem must appear on your new appearance. You can also adjust your height and weight, but not so much that your size changes. You can make yourself appear as a member of another race, though none of your game statistics change. You can’t duplicate the appearance of a creature you’ve never seen, and you must adopt a form that has the same basic arrangement of limbs that you have. Your clothing and equipment aren’t changed by this trait.

You stay in the new form until you use an action to change your form or until you die.

Starting at 7th level, you can cast the polymorph spell with the range of self, once per long rest.

Starting at 9th level, you can use this feature twice per long rest.

Starting at 12th level, you can use this feature three times per long rest (No spell slots or spellcasting modifier/save required).

You retain your mental ability scores (intelligence, wisdom, and charisma). You can also speak using your usual voice while in a beast form, but you cannot cast spells or take any other action that requires hands or speech.

You have an inorganic body, represented by the following benefits:

• You have advantage on saving throws against being poisoned, and you have resistance to poison damage.

• You don’t need to eat, drink, or breathe.

• You are immune to diseases and the effects of aging.

• You don’t need to sleep, and magic can’t put you to sleep.

• When you take a long rest, you must spend at least six hours in an inactive, motionless state, rather than sleeping. In this state you appear inactive, but it doesn’t render you unconscious and you can see and hear as normal.

A Gem's stone functions as the core of the creature’s being and the focus for their magical traits. Your gemstone is large enough to fill an average humanoid’s palm and protrudes from one specific section of your body, such as your shoulder or forehead. It is of average-to-high quality, comparable to gems worth between 50 and 100gp, but it cannot be used as a spell component. Your gem is considered enchanted for the purposes of Detect Magic and similar spells.

When you enter an antimagic field or your gemstone is targeted by Dispel Magic, you must succeed on a Constitution saving throw against the caster’s spell save DC. On a failed save, you become stunned for 1 minute. If you are within an antimagic field and fail the saving throw, you are stunned until you leave the field. If you fail your saving throw and your gem weapon is unsheathed, it disappears (see Gem Weapon).

When you become unconscious by being lowered to 0 hit points, you loose physical form and retreat inside your gem. If you are holding any items, they are dropped onto the ground. You still count as a medium sized creature for mechanical purposes during this time. If you gain hit points while unconscious, your body reforms around your gem instantaneously. When your body reforms in this manner, you can change your appearance once (according to the section on Shapechanging) as a free action.

When you die (whether by death saving throws or some other effect), your gem shatters and becomes inert. If the gentle repose spell or other similar effect is applied, your gem will still be shattered but wont become inert. Once your gem is inert, you cannot be resurrected.

You cannot become undead.