SRD:Metamorphic Transfer

Metamorphic Transfer [Psionic]
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 (You are still subject to other restrictions on the use of the ability.) The save DC to resist a supernatural ability gained through Metamorphic Transfer (if it is an attack) is 10 + your Cha modifier + 1/2 your Hit Dice.

No matter how many times you manifest the metamorphosis power on a given day, you can gain only a total of three supernatural ability transfers per day.

Normal
You cannot use the supernatural abilities of creatures whose form you assume.

Special
You can gain this feat multiple times. Each time, you can gain one additional supernatural ability.