Source: Expanded Psionics Handbook
You can gain a supernatural ability of a metamorphed form.
Prerequisite: Wis 13, manifester level 5th.
Benefit: Each time you change your form, such as through the metamorphosis power, you gain one of the new form's supernatural abilities, if it has any.
You gain only three uses of the metamorphic ability per day, even if the creature into which you metamorph has a higher limit on uses. For instance, if you gain a dragon's breath weapon, you can use that ability only three times before losing access to the ability for the day. (You are still subject to other restrictions on the use of the ability.) For example, after you use a dragon's breath weapon, you can't use it again for 1d4 rounds.) The save DC to resist supernatural ability gained through Metamorphic Transfer (if it is an attack) is 10 + your Cha modifier + 1/2 your Hit Dice.
Special: You can gain this feat multiple times. Each time you can gain one additional supernatural ability.
Normal: You cannot use the supernatural abilities of creatures whose form you assume.