Monks are versatile warriors skilled at fighting without weapons or armor. Good-aligned monks serve as protectors of the people, while evil monks make ideal spies and assassins. Though they don't cast spells, monks channel a subtle energy, called ki. This energy allows them to perform amazing feats, such as healing themselves, catching arrows in flight, and dodging blows with lightning speed. Their mundane and ki-based abilities grow with experience, granting them more power over themselves and their environment. Monks suffer unique penalties to their abilities if they wear armor, as doing so violates their rigid oath. A monk wearing armor loses their Wisdom and level based armor class bonuses, their movement speed, and their additional unarmed attacks per round.
There is no other class that is given quite as many strange and unique abilities as the Monk. To be able to use unarmed attacks that cause as much damage in combat as a trained fighter with a magic weapon is an astonishing feat and thus, the Monk is rare and special individual. The Monk's special abilities are mostly based on the prevention of damage; the best saving throws in the game, additional natural armor class through keen awareness of surroundings (Wis) and ever increasing layers of resistances to poisons, aging, mental attacks and so on. The Monk training is so particular and rigorous that, once you leave the class and multiclass to another class, you cannot ever take up the Monk's path again.
The Monk's skills (and the key ability for each skill) are: