Timeless Body (Ex)
Upon attaining 17th level, a monk no longer takes penalties to her ability scores for aging and cannot be magically aged. Any such penalties that she has already taken, however, remain in place. Bonuses still accrue, and the monk still dies of old age when her time is up.
Tongue of the Sun and Moon (Ex)
A monk of 17th level or higher can speak with any living creature.
Empty Body (Su)
At 19th level, a monk gains the ability to assume an ethereal state for 1 round per monk level per day, as though using the spell etherealness. She may go ethereal on a number of different occasions during any single day, as long as the total number of rounds spent in an ethereal state does not exceed her monk level.
Perfect Self
At 20th level, a monk becomes a magical creature. She is forevermore treated as an outsider rather than as a humanoid (or whatever the monk’s creature type was) for the purpose of spells and magical effects. Additionally, the monk gains damage reduction 10/magic, which allows her to ignore the first 10 points of damage from any attack made by a nonmagical weapon or by any natural attack made by a creature that doesn’t have similar damage reduction. Unlike other outsiders, the monk can still be brought back from the dead as if she were a member of her previous creature type.