Radiance:  Shu glows very very brightly for a moment.  The light moves towards his hands and projects outwards in a beam towards his enemies. This attack varies in power depending on how much energy Shu puts into it.
Inner Healing:  Shu enters a meditative trance when he casts this.  While in this trance he heals at a supernatural rate.  This power accelerates his healing to such a rate that most cuts and wounds can be healed within a few minutes.  It is still slow enough that he would need protection to use it on a battlefield.
Spell Turning:  This spells stems from the Elemental Staff’s control over elemental magics.  Whenever a magic spell of an elemental nature is cast Shu wrest control of the spell from the caster and manipulate it as if he had cast it himself.
Unnamed Power:  This spell is a conglomeration of all the different types of magic in the world.  When all the different types of magic become one they become the very material that the world is made of.  Shu handles such vast amounts of the different magical energies and pulls them all together into such a small area that he effectively creates a mini black hole where he chooses.  If you –really- want a longer explanation from me about how this power is fairly logical in a world possessing magic send me an IM.