Rally in Vespacore
Ki is the elven art of channeling magical energy into physical activities. Practicioners run faster, jump higher, hit harder, and perform amazing spiritually infused powers.
These powers are the Tao Chi from the Mystery Codex. However, as a house rule, instead of Martial Arts, the powers can be tied to a weapon skill or acrobatics instead. Martial Arts is the only skill which allows access to all the powers, and the powers need to be learned seperately for each skill they are attached to. Ki Mastery is also still required.