Healing isn't by most definitions a form of spell casting, rather a healer channels directly from another plane, the plane of life. The skill of a healer is being able to draw that energy and then manipulate it to repair even the most extreme damage.
Unlike a physician, a healer doesnt work with the physical body, by applying the power directly to the pattern, the damage is repaired at its base level and then extends otuwards and repairs the physical side of its own accord.
Like other forms of casting, there is an alternate form known as Corruption, named such for the skills it allows focus on disrupting or damaging a pattern instead. A corruptor draws their power from the planes of unlife.
The following spells are available to a healer. Any healer is also able to learn the summoning art of Elementalism
By maintating a chant a healer is able to one wound per 10 seconds of chanting.
Allows the caster the purge a number of simple poisons from the target.
Removes and non-magical disease from a body, but heals no damage done by it.
Grants immunity to fear for 10 seconds
Removes a paralysis effect from the target
Aura of Defence
Protects the caster from all non-magical damage and first and second tier spells until an they make an aggressive action.
Removes a number of mind effects from the target.
Heal Fatal Wound
Removes a Fatal wound from the target, however does not heal the damage caused.
Purge All Poisons
Allows the caster to purge a number of complex poisons from the target.
Removes a Decay effect from the target, however does not heal the damage caused.
Strengthens the target, allowing them to resist a single strike to all parts of body until dawn.
Shield from Corruption
Protects the target from the Corrupting effects of Fatal, Decay and Disease for 10 minutes.
By maintating a chant of Rally, all within 10ft of the caster become immune to the effects of fear.
This spell will remove all poisons, disease, decay and Fatal effects and heal all damage caused.